If I pay down $50K, how can I calculate the new monthly payment?

No fees, no pre-pay.

@Matthew Cook I would NOT pay for the renovations unless I was on title or had a very formal contract written about the split of profits.

If someone is paying cash or putting down 50%, it would "cash flow" better - there are investors in the Bay Area that have a lot of capital, not usually a first time investor that pay cash.

Cold calling/texting works but you'd have to pay for the numbers and make the calls.

So really need to do some deep market research, haha, but not so willing to pay for this, at least not at this stage when I'm just starting out.

The economics simply do not favor the investor.  

I have done 3 showings with a few more lined up. 2 parties have expressed interest and I want to request your help in choosing between the options:Party1: Willing to pay $4,000 p.m.

Note: We do 50+ investment property loans a month and the most important thing I tell BUYERS of properties being sold as or soon to be STR is make sure you are paying the market price per square foot and do NOT buy based on income approach/CAP rate.

I think the LLC also makes it easier to open a local bank account, which is convenient to pay utilities or other local bills or your property manager, etc.