I bought numerous investment properties and flipped some, and held others long term. 

Which options seem to still attract good tenants?

This is just a general idea and would obviously depend on what the actual numbers looked like for this property and if the Unleveraged return is good enough to attract outside capital.

given that the property is also attractive with new amenities and such, I think it should work well in that STR/MTR space. 

Set up the units to be attractive to that type of customer.

I would love to see what you guys think I should do to attract more leads, as I do not want to get stuck paying the full mortgage for another month.

Any thoughts out there -- it seems like there are numerous benefits to ownership of a home and a double rental home seems like it would protect some of my earnings and allow me to build equity into SOMETHING (anything) so that maybe someday I could even buy my landlord's home when his health gets worse and he cannot stay here any longer and we would live in our beautiful location with a rental on the property as well. 

Commercial real estate has a much higher potential for return than single family properties, making it an attractive option for those looking to maximize their investments.

Even though if things go through with this prospective tenant they will be paying $1650 and $20 each per month for two dogs netting $1690 (that's very attractive lol)?

Tends to attract a younger /trendy crowd.