Total cost was $4,600 installed for custom made vinyl 19 windows (dang old houses and their weird sizes!).

But I see a big part of the business from colleagues in the industry comes from repeat customers and I am afraid the size is simply too small to be comfortable to live in for a week. the rental price would more or less be the same for the end customer if I make it a small studio or slightly bigger.So my question is would you be happy with a 28 m2 / 300 square feet studio for a weeks vacation or should I go bigger and then fewer studios ?

I generally prefer a Custom Area Rugs over a wooden floor.

We have banks and private lenders and when a customer needs funding we present the correct loan for the right company.

As a contractor I dont care what the customers budget is , the work cost what it cost .

Non-Sanded Grout (123-851) Stove – Frigidaire 30-inch, 5.0-cubic feet with Self-Cleaning Convection Oven in Stainless Steel (548-983) Dishwasher – Frigidaire Gallery 24-inch, Front-Control in Stainless Steel (169-416) Microwave – Frigidaire 30-inch, 1.7-cubic feet, Over-the-Range in Stainless Steel with Sensor Cooking (533-524) Refrigerator – Frigidaire 18-cubic feet, Top-Freezer in Stainless Steel (1000002771) Granite – White Thorn (Custom Granite Company)Link

Beyond that, knowing what kind of rehab is worth the money, knowing the market, leasing knowledge (laws/sales/customer service, etc), and any number of other things could immediately sink you.   

If you need a custom-sized closet or want a truly integrated look, sheetrock and 2x4's are cheap but the doors, base and case moldings, and time can add up quickly.

It is a great way to hold others accountable to what your expectations as a customer are.

There a website or certain area to go and get a wholesale form  for the customer to sign?