I could see it working.
In the beginning, she’s just bought her house. She’d be going over how she imagines it should look like.
“Maybe if I place some tables under the windows over there, it’d attract pass-byers who’re curious. Then this end down here could be used as a kind of private area, with maybe some paper-walls separating the tables from each other. Then up here I could maybe have something like a bar, where you’d be able to sit on raised chairs, kinda like the western style I’ve seen lately.”
Catch my thought?
Given that she just bought a house she wouldn’t have much money left to by an inventory (tables, chairs, cups, plates, etc.) for, which means she’d have to start with a few poor quality cups and some pillows placed around some low tables (if you want to go with Japanese style). Of course she’d have to buy a better inventory when she gets the cash to do so. The financial aspect, if you want to make a bit bigger of a concern, could be how she manages her personal expenses compared to her business expenses, and how one affect the other, like:
“These cups are more appealing than those I already have, but if I buy them, I might not have enough to get a warm meal each night. But on the other hand, it might boost my sales just enough to allow me to get past this week.”
Kinda like that.
Then there’d also be her living quarters of the house. Maybe it would be necessary for her to use some of that space as storage. Or when/if she gets workers, she could use some of it as a break room.
>How do I determine how much tea is sold for?
That’s a story element for you to decide on. She might get few customers, but those she gets are repeat customers who come once in a while. On your own, you need to determine how much the tea is worth, then how many customers buy how much of what. Something you can do behind the scenes, or maybe you want to make it specific that those touhous are customers, and this is what they bought with a total worth of that.
I’d say, either keep it in the background and only inform it when informing a customer, that way a reader wouldn’t feel it’d be something overly important, but still pay attention to it.
>What is the initial cost to acquire it?
Again, that’s for you to decide. Or maybe something the reader should decide on. Present them with a choice between two suppliers. One offers green tea in this amount and at this price, the other offers black tea in this amount and at this price. Depending on what they’d pick, you might lose some customers who unsatisfied or gain new ones who wants to try it out. Maybe your repeat customers will share their thoughts on this and give their opinion.
>If money is spent on the teahouse, what does it do?
On the teahouse? You mean such as decorative inventory or remodeling? In that case it’d increase the visual appeal of the store which might attract more customers, since it starts looking more like an actual shop, instead of a rundown building bare standing.
Or maybe you meant like an investment towards getting a new item in store, or maybe use the money so she’d be able to give a service which’d attract attention and/or satisfy the customer.
>Would buying nicer teacups, realistically, have any effect on your income?
Depends on how far you look. If you buy a few new cups and expect your sales to skyrocket, then prepare for disappointment, because that won’t happen. But in the end, it would. It’s a slow chain reaction. The current customers would be satisfied and recommend the place to their friends who might give it a try, giving them a new nice cup instead of a clunky clay cup (say that three times fast), then they’d be more likely to come again, provided the tea and service was good enough.
Something to need to keep in mind is that the two things you should be focused on, no matter what business you run, is you need to attract customers, and you need to satisfy them. Putting your all into those two is the best way to build a business.
The amount I’ve written to help you has already exceeded the amount I’ve written as updates for my story this year. That’s quite sad actually