If someone doesn't pay their rent, then it can take over a year to evict them, and then I'd be left paying that mortgage and fees for a lawyer, etc.

Fees are through the roof. 

Each closing, whether multi-family or single family, is going to have some of the same costs: title insurance, attorney fees, inspection fees, appraisal fees, fees associated with financing, etc.

I'm not satisfied with not filing the rental in an LLC simply because it's more simple and might cost me an additional filing fee .

If anything explain that there is a fee on top of a lifetime charge (which on its own is kind of weird), but okay. 

Ultimately its the brokers, PM's and lenders who are advocating for this strategy because they are collecting their fees.

Yearly bank fees for each, aka choose your bank wisely.

I asked the tenant that he pay the 2nd plumbing fee of $79.

Separate accounts per property incurs a lot of overhead, such as minimum balances or fees for missing the minimum.I use separate accounts for each tenant's security deposits.

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