I double "co-hosters" in most markets are getting 25-30%.If property management interests you I would suggest you become a licensed and insured PM company to increase your credibility. 

Get the Certificate of Insurance for the electrical contractor in case there is an issue during installation and also thereafter. 

Brokerages are just umbrellas to keep you safe (insurance) from the rain.

I received a notice from my rental property insurance carrier that they will not renew my insurance policy covering my rental unit.

Modulars are a little better because its easier to get FHA and VA financing so they can sell quicker to a wider group of buyers.FHA can be refinance down the road so the MIP - mortgage insurance premium similar to PMI but more expensive. 

A larger home (3/2+) could be a good fit for insurance rentals.

You can, however, count on an annual increase in taxes and insurance. 

Maybe insurance will cover it.The property manager can't possibly sit in a rental 24/7 to ensure nobody squats.

Do you increase the rent by strictly calculating the increases in your insurance, taxes and etc ?

THE LIE - this occurs when the wholesaler shows the homeowner false  comps or provides false information which lead the homeowner to believe his property is worth significantly less than it is.