Additionally, managing series LLCs can be challenging, especially when it comes to opening bank accounts or handling titles for individual cells, which can create unnecessary complexity.

I would not rent to this individual. 

Some lenders only lend to individuals.

I feel it's extremely important that I link with like-minded individuals.

A lot depends on an individuals motivation, dedication, learning capacity, decision making capacity, analytical ability, time available, support system, mental state, and yes, luck. 

I am guessing only you would be signing the 18 month lease and this individual who is there to "help" won't be voluntarily offering their signature as a co-signer?

Also curious if people use an agency or an individual.

If we want to hire individuals for each of the task, where do we start and what are the steps?

I'd definitely look for networking opportunities in your area to meet like minded individuals.

If someone stays at a property for 14 consecutive days or more, they could potentially be considered a tenant under state law, even if their stay is structured as short-term renewals.If the individual is classified as a tenant, landlord-tenant laws would apply, meaning you may need to follow formal eviction procedures to remove them.