I have been advised that legally I could force the buyer to close, with the letter of indem. 

@Joe Hines  I have used an online verify site to do this. 

When you need legal advice it should be discussed openly at the meeting and a motion made to contact the lawyer.Fishing Derby Funds - a set amount (say $1000) should be left in the account from year to year as seed money.

I came across the quickbook tool by reading some online articles.

So I finally took the real estate course online and took my state exam, first attempt I got a 72 and you need a 75 to pass.

Since it takes so much to take the papers and start running my apartments I consider now starting a business where I can deduct all my expenses like the homes fixing at the beginning and the future properties that I consider buying but by doing this plus the short-term renting that I consider with tourists/visitors I feel more risk exposed since I will have to pay for a business loan with 6% interest, and an accountant to keep my business papers which will need another 120€ Monthly(that's for a Private Company which is considered to give a legal protections since me as an Individual is not exposed similar to protection that an LLC provides at the USA.)What is the community's opinion about what will be better for me? 

Secondly, is it legal or allowed to buy a new house in a neighborhood and rent it out?

It's a waiting game even when you do succeed in taking legal ownership of the properties.

@Henry Der you need to get some legal and accounting advice. 

I also don't know if 'gross profit' is a standard metric (vs. net income as on line 24 of a schedule E) on STR income statements or not (again, I've never owned/managed this asset class) but on the surface it looks like you would have some direct labor costs (somebody needs to manage the inn, so to speak) and recurring utility costs at a minimum.