Echoing some of the comments from others on this thread and adding that the LLC is purely for asset protection and limiting your personal liability. 

The fact that you already have multiple units fully rented is a big plus.If I were analyzing this, I’d start by verifying each cottage’s rental history, condition, and potential for adding more units or amenities.

Aaron I would not pay but if they wanted to have this added I would have a licensed electrician perform the work. 

With that said I am looking to do minimal work to renovate the home such as painting and adding new appliances.

We have a 14-page management contract that we've added our real experiences to over the years, with the intent of protecting both us AND the landlord.

You're literally the prey these ad predators work off of, do you not see how gullible you appear?

One option I'm considering is adding the equivalent of a camelback, or second story over one side of the home, adding ~900-1000sqft and 2 or 3 bedrooms. 

I’m in the San Diego area and my husband and I are adding 2 additional rental units to our property. 

If you feel ambitious, you could try a BRRR strategy adding additional equity to the subject home and then taking equity out of it to pay off either the HELOC or if you decided to the refinance the primary residence. 

Added convenience and always surprises the buyer when they open a closet and see the laundry units as opposed to another linen closet.