I would be handling everything involved with closing the deal, hiring management, and increasing NOI.

That said, I know I could hire a management company for a multi family as well.

Do I hire someone to design it?

I am probably going to hire one of them to prepare the partnership 1065 and K-1 in 2022, but I don't have a CPA right now. 

Contrary to what these guys above say, you can still do really well if you hire someone to do it all for you.

Most smaller facilities will hire someone to go around ad clean up a bit once a week or so, not necessarily a qualified contractor but someone reliable who can take a few hours' work per week. 

@Olivia GulledgeIMO 5 years is not a short period.You can buy a property there and continue to rent it out after you leave.You may need to hire a property manager after you leave.

For scale its best to build out your team instead of just doing the work yourself (i.e hire a GC instead of being one yourself).

I'd like to avoid hiring a property manager (I've heard uniformly bad things about them, not to mention the cost), and things are pretty stable (solid properties with great tennants). 

If you don't like the property manager think about hiring another company.