Ford Motor Credit will do no pg business auto loans/leases, but you need a strong DNB profile, with high trade limits reporting.

I would avoid spreadsheets, since there's definitely a "too many cooks in the kitchen" problem with that approach. 

Seems that inventory is very low, property prices and interest rates are very high.  

The reality is that low supply of single family properties will keep a high floor for prices.  

Your concern is a good one, buying in this market at high rates = high payments and you may not cashflow if you were to repeat the process.However, 2 considerations. (1) By not doing it you don't have 800-1000 in your pocket, so although the payment on the new place might be higher than in a normal market you've got extra funds to cover it.(2) Your new rate is not forever, perhaps in this high rate market, it's as you say, best case you're breaking even if you repeat this process.

She threatened me that if I don’t give her a full refund she will definitely give me a bad review.

There is a vetting process for members, which helps to keep the quality high, but a downside is that it's not as big as other groups. 

There are some "lenders" out there who "do" incredibly high leverage or 100% financing, but be wary of these as they often try to renegotiate terms before closing/run out of capital/go bankrupt.

The two downsides to syndications are the high minimum investment and the difficulty in finding good sponsors and deals, but you can solve for both by joining a passive real estate investment club.

The first people that lose their money in a downturn are those that are lending at insanely high LTVs without adequate underwriting experience including determining if the borrower's qualifications based on credit/character, capacity, and collateral.