They are also simpler over the life of the unit to maintain because there are just three main components instead of four(+) with HVAC.  

This leaves Open the opportunity to sell the trailers to the current residence along with responsibility for maintaining them and just overall leaves me a lot more freedom with more options imo.

This may include examples such as maintaining the landscape, a minor plumbing repair, doing shingle repair on a leaky roof or painting a few rooms between tenants.

Month to month leases are a great way to maintain control over tenants who are possible problems. 30 days notice is all it takes to get rid of them.

I want to be able to maintain my business in both markets. 

3) pull a few lists4) edit / cull down using excell sorting.5) upload to skip trace or upload into your marketing tool (post cards, SMS, RVM etc)6) fire it off7) deal with replies,  tuning / maintaining the tools.8) digging into a replie's house details. 

I pay $100/month to have my pool maintained in Florida.

Networking with other investors and seeking advice from financial advisors can provide valuable insights and help you avoid common pitfalls.Keep an eye on your financial health by maintaining an emergency fund and avoiding over-leveraging.

IMO, as a landlord, if you don't wish to maintain an appliance just don't include it.

Thin line between allowing self promoting and maintaining interest on part of vendors or investors with something g to “sell”.