We find 2 bedroom units and smaller attract travel nurses, while 3 bedroom or larger attract the types of guests Patricia mentioned above.

Since you're an individual, mainly whether or not the 4plex was built in the last 15 years.Assuming the tenants have occupied their units for over a year you'll want to give a 60 day notice.Alternative route?

The main monthly meeting is this Tuesday (Nov 12).

I have heard alot of success stories where Bigger Pockets  was one of their main resources in achieving those Goals. 

You would continue to defer all of the tax and receive potential cash flow until the market becomes more attractive for you. 

Now private lenders are my main purchase method, along with seller financing and BRRRR.

Only 1 was found through the MLS, but more recently that has become my main option.

This is actually one of the main reasons many agents and investors may not like them generally speaking (they are often not serious professionals with a proven track record of success, the vast majority are struggling to find their first deal and are time-wasters to interact with).   

I just bought a Lake House in Maine this past summer.

Hey David, I think the main issues you will encounter is the minimum loan amount and minimum as is value.