Is there a common practice to shop this deal around (for funding) to let's say private lenders, without them theoretically stealing the deal (Property) from you?

FYI, I'm no longer a practicing (or licensed) attorney, so none of this is intended to be legal advice.

That being said i would strongly recommend one for a couple of reasons.Until you have a solid understanding of the ins and outs, standard practices and the risk involved its always the smart play to enlist someone that does, also you will need a title company as well and most RE attorneys i deal with also take care of the tittle side of the house. 

The 1918 was practically the stone age compared to 2020.

I think there might be some bad debt collection practices if the repayment was solicited when no debt was owed.This sounds like a scam, to be honest. 

It's a big book full of practical advice from marketing, screening, leases, collecting rent, etc.

Don't feel bad, this is exactly why 80% of borrowers mis-state their income.Your math implies that there are 4 weeks in a month.If there were 4 weeks in a month, and 12 months in a year, that would imply 48 weeks a year.But there are 52 weeks a year, because there are not EXACTLY 4 weeks (28 days) in any month, excluding February.The instructor is correct, that's the exact math I did in 2 seconds when I read the question. 14.50/hr times 30 hours a week times 52 weeks divided by 12 months.In practice, this is unlikely to be the actual number that an actual underwriter would use.

Watch a couple of the videos or read some blogs on BP and then practice a few times.

If  not using an agent then a real estate attorney is a good idea especially in the beginning, they can draft your PSA based on you LOI or your specific needs, they also should have a good understanding of what the standard practices in your area are and what needs to be in the contract in you locality.  

Thanks for the response and I will make sure to always practice good credit habits.