Janine
I am next door to you in Washington and you can go either way. We have a few parks and we utilize both options. Much of it depends on what your needs in the park will be.
If your manager is just 'keeping an eye' on things, collecting/reminding on a few rents here and there and some light cleanup while being compensated in free or reduced space rent then classifying them as 1099 subcontractor is great. Their dollar compensation is their free/reduced rent.
If you have a lot of maintenance with landscaping or POHs then you hire them as an hourly employee. For our larger park we have a 'Maintenance Manager' set up for up to 24 hours per week as needed with OT for after hours emergencies. The IRS is very clear about the distinction between the two scenarios. 1099 subcontractors provide their own tools, set their own schedules are not directed by the hour. Employees work for you and do as instructed with your oversight. You can do it either way and reality is you will never be audited. It is your park to run.
But there is a cautionary side to this tale- you should pick one of these two options. Far too many parks just 'give' a resident in the park free space rent to keep an eye on things and do light maintenance with no 1099 reporting. If that person were to get hurt somehow and then expect you to pay the medical bills or become disgruntled in some way it is just a phone call to DOR, OSHA or L&I. Your park name has now landed on someone's government desk and you will eventually be forced to answer a lot of uncomfortable questions. We also own an accounting/payroll firm and have a lot of MHPs, residential communities and apartment complexes as clients and have seen this happen a few times.
Lastly and then I will stop rambling... and this is just my opinion. I think it is pretty rare that people getting free space rent actually work enough to earn it. We have another park with a free space rent manager and as we have raised the rents he continues to live there for free. Good guy, little forgetful, but I wish we hadn't inherited this arrangement and it is tough to retract it. We are eventually going to have to address this.