Consider whether they are even qualified to be your partner.

To get there, at a minimum you will have to:Repair the 11existing homes x $15k per home = $165kHunt down 7 used homes, transport, set up, make repairs x $25k per home = $175kSell all 18 homes to qualified tenants (you will likely have to carry paper on the homes, which will eventually return the capitalization above, but assume it will take 5 years or more)Repair the park infrastructure, roads, signage, the residence, landscaping, etc (let's assume you will spend at least $50k on this if you are lucky, though it could easily turn into a lot more) The bullet points above will likely take a couple years and it could take double that, depending on how aggressive you are, what the availability of good labor/contractors in Indy, and what kind of demand exists for that location.  

The trip doesn't have to be "100% business" to qualify.

I have been considering adding a skill to my arsenal: SALES, to help fund my Real Estate investing.

So with that logic, if two systems are improved and it's more than 2500, combined, would it not qualify under DMSH as you mentioned on your first post, or we can interpret ( more taxpayer-friendly) treatment of applying DMSH to each system first. 

Everything so far has been done through email, the pre-screening, scheduling showings of the property, as well as the application (im using RentPrep) Another thing, with using RentPrep I had the option to have the applicants pay the fee themselves to run the screening (I used this option with all applicants) Im wondering If this still qualifies as the ''landlord'' accepting a screening fee, if not, would I still need to send a denial to the applicants? 

I am not familiar with work you do, but I would recommend looking if you are qualified to invest into Solo 401K.

My point is that each one of them requires a higher level of skill and a higher level of risk. 

Be sure it’s recorded with the city and state and done with a skilled re attorney who -has done these -in your state .

Ask them what you need in order to qualify.