I think your best bet would be a virtual assistant.

@Steven Hellinger you bet! 

Not cheap either, and these days with the new structure it's the same cost as going to the land registry office (LRO pricing went up).If instruments aren't an absolute necessity, then access to Geowarehouse (paid, or through a lawyer or real estate agent) is the best bet.

So I would like to know what would be my best bet for a conventional loan (heloc/equity loan/etc) and if anyone knows of good lenders for this situation. 

Your best bet might be lowering to $650-675 and trying for a 2-year lease, that way you minimize vacancy next year.And absolutely you should take control of your marketing. 

If I was to bet, I would assume 20 years in the future that tax laws would be less beneficial to investors.

You want to study the ponies, then you might want to create a business around horseracing - I don't know, t-shirts with a picture of a famous stud playing poker or some #hit - rather than betting on one horse to win.

Realistically, your best bet is to find buyers for the 4 properties and charge them  commissions on the deals.

In my experience it depends on zip code, type of property (SFR, duplex, fourplex, more-plex, etc), price of property and amount of down payment - beyond just what you listed.Your best bet is to go to bankrate.com and check there by entering your info.

Your best bet is to find a mentor who expects nothing in return.