Have some very competitive prices to start with to get bookings and reviews.

What costs/fees should I look out for?

I'm looking at monthly cost to seller vs. anticipated rental income, purchase price relevant to the ARV of the area and interest rate, balloon, etc.

A stunning bathroom can (and will) certainly make you stand out against the competition!

Most cost segregation firms will provide a free cost/benefit analysis quote to help you determine if the tax benefits from the study will outweigh the costs.

What should it cost?

Here's what you need to know about qualifying and managing costs, including realtor fees and other expenses.Why Germany?

It would/could be only 15% capital gains tax and yes you could/would deduct all selling costs including commissions and transfer taxes.

Quote from @Chris Magistrado: I'm doing my research and I came across wholesaler who said if the buyer is requesting an inspection, they aren't a real buyer, probably just a wholesaler trying to scope the competition or lock up your contract. 

@Ella Marie, I can't speak on behalf of your market, but in my respective market, competition is tough, and the successful fix-and-flip vendors are often full-time operating businesses.