Hey @Mohammad Al-hadad,The first thing I would say is that the cool thing about real estate investing is that there are many options and styles about how to invest and what strategies you want to pursue.

If sales price is 400k and I want 75k cash but tenets only can provide 15k, what are my options?

Hey jeremy, sometimes the best options may not be local I recommend asking some qualified investment focused brokers 

These funds combine money from investors and give them the opportunity to explore Investors may choose from a wide variety of funds, each with its own targets.

You will then have a few options with that rent money....you can put it into principal or you can start saving it to purchase yet another property.

A bill that would have increased property taxes 400% on all STRs failed by a wide margin on Tuesday. 

., seller financing, lease options, etc.)?

Certain suburbs don't have many options for multifamily, so you might have to open your search to other locations.

Real estate investors have a variety of financing options available to them, depending on their financial situation, investment strategy, and the type of property they're interested in.

I would probably have to return the down payment and option money to the end buyer, and he is probably going to sue me.