Alternatively, your parents could hire you as their employee to manage their properties (at least here in California).  

I've never personally hired a sub company for a non-owned job over 30k so I've never had the need. 

He wants to buy a buildable lot, seek financing and hire a GC to build. 

lol. that's funny what he said to u.. i am guessing he knows you do all that work yourself, which is the problem. my people were concerned i do all the work. they were super relieved/happy to learn that i hire it all out now.

Let me preface this with I ALWAYS hire someone.

Hire a collection company that works with HOAs to handle the entire case.

One option is to hire contractors that specialize in investment property rehab and manage themselves.

If you need an air conditioner repaired or a roof replaced, a PM will tack on 10-20% of the cost of the repair .. just for making the phone call. 

@Douglas Snook  how does title work in your state.. do you use title companies or is it attorney driven and you have to hire an abstractor to run title.. or can you simply call your title company like we do and in 2 minutes you have a TRIO showing last recorded deed and mortgage e mailed to you.We are seriously spoiled here on Left coast when it comes to instant and free information on properties. 

If you find another investor in your area you could hire him to check up on the place, and you could exchange the favor when he is out of town.Good luck and enjoy the RV lifestyle!