I personally don't charge an application fee, because of personal reasons...I screen and then let the selected tenant complete the criminal/credit/background check through an independent party that collects the fee.

Five friends will be high risk for turning into an animal house.If you're this desperate, I would at least charge extra rent per additional person.

If they don't clean, charge them for it.

Commissions are negotiated and can be more or less depending on your office policy.Or, again with your managing broker's permission, tell the seller you know several investors that might be interested and get a listing... maybe a limited listing instead of a contract to buy it yourself... maybe as a transaction broker so you're just helping the buyer and seller consummate the sale (not representing either party as a fiduciary) and charge a commission instead of a wholesale fee.Just spit-balling ideas for you, but check with your managing broker to structure something that does work for all of you.

I’ve met commercial loan brokers that charge 2% to setup the deal.

It only costed me half the charge by doing digging way instead of tunnel way. 

The reputable RV parks that do allow short term rentals, charge a management fee to manage the site since it is assumed you (the owner) are not going to be there very often.

Some even charge for renewing leases. 

I think your estimates on what to charge for rent in Hastings is low.

A lot of emotion gets involved and the HOA wants the people out.Depending on the property condition, the HOA could foreclose then rent out the place until the bank can get around to foreclosing.I have assisted quite a few HOAs in the past who have foreclosed not having a complete understanding from their attorney about what happens to the 1st mortgage.