@Joseph Hennis If I read correctly, it sounds like you are planning for retirement on rural acreage and these investments are to support that lifestyle...as I'm sure it'd be a challenge to do your job living rurally....in which case that makes you a cool dude because I want to do the same thing LOL.
I didn't do the "what would you do" portion of your question so here's mine, maybe we share a common goal:
sell property 5, so I could have a new primary residence that I'll mention later
Sell property 1 (unless it is in a super exclusive area that's going to explode in value even more in the near future making it a keeper). The amount of equity in that property.. could make a down payment on a couple of multiplexes rather than own just the one property, eliminating 2 debts in the process
House hack. Using the aforementioned equity, acquire yet another multiplex and occupy a unit (much lower down payment and rent for owner-occupy) so I live for free/cheap s save for retirement on that acreage...and I can give retired parents a cheap unit to rent (helps them) and I have a timely and familiar tenant (helps me) and they're close by in their own space (helps everybody). Maybe that multi-unit constructed on the acreage if you really wanted and if that acreage is attractive to tourists, you could rent long term or airbnb those units. I'd avoid the mobile home, depreciates and becomes ineligible for financing after long enough....and they suck, they break down I've lived in a few. If I did my math right, you got 180k of equity sitting in a SFR, I'd put it to work. fun topic, nice portfolio Joeseph