I find myself undecided to payoff the 70K loan and capitalize on the rental income or use that cash to put down for another property. 

You do the work, they put up the capital.

I get bored pretty easily, so I like to reposition when it makes sense...either taking capital gains or working through a 1031.I don't need the cash flow, so control of assets is my primary concern...different than what 99% of "investors" will tell you...In general, there is no better way to control assets than through purchase money mortgages.

I mean I can only analyze as many deals as the capital I for buying deals.

I also was considering selling some of my after tax investments but then I would need to pay capital gains on that money.I searched around the forum and could only find posts targeted at heloc vs. home equity loan so if i missed it and someone has a link I would appreciate it!

Rate would not change and could still pull capital out. 

Are there investors who have experience with Wildhorn Capital?

My goal is to get my degree(s) and obtain a job that pays the bills and allows me to build capital while investing in rental properties/real estate. 

I think after 10 years the capital gains are tax free.

My advice to you when sourcing outside capital would be to CLEARLY define roles...  40+ units is no small venture.