My mentor says you can get more cash flow and liquidity with SFH vs Multifamily, since brokers seem to want a certain cap rate on sales accross a geographic area vs when working with SFH sellers, they're more flexible and motivated based on individual needs.What are your thoughts on buying SFH vs Multifamily?

Last I did their rates were 1-2%. 

and unfortunately, with rates and prices high, it has just gotten very, very tough to cash flow on long term rentals.i browsed a few other threads you started and it sounds like you already own your primary residence and are looking to get started in investing. 

Would a bank(say like BankofAmer) allow me to assume the low interest rate of another property and blend the interest rate with my current rental property?

You’ll get an automatic 20-40% discount (tax deduction) off the rates which might make doing it yourself not worthwhile. 

Im looking to do a STR in Ocean City Maryland and the vacancy rate, if I'm fully booked in the peak season (May -Sept), would be  58%!.

Each lender, for the most part, is going to have similar rates. it really comes down to communication and their process!

Insurance has been a big issue in our market this year as companies have jacked rates out of control. 

The terms of your mortgage and interest rate will remain the same and no refinancing would be required.

Lending could be an option but with interest rates high 7, I am looking for other creative options.