They'll charge you bogus feees upfront and nothing will ever come of it.

If I ended up installing the security door can I charge her for the installation?

I would think you'd have to do that as a water fee or something and not as rent.I don't think you can charge single occupants less than say couples or couples with kids.

If you've worked with a plumber a few times he shouldn't charge you for this. 

Plus, @ $50/mo, the tenant likely doesn't realize they are paying more than they would being individually metered since you only pay one customer/meter fee which makes up the majority of that charge...$35+ of it is likely a per-meter "customer charge" and not based on usage.

Then detail charges on the security deposit reconciliation for rekeying the unit and for the cost of the cleanout.CRLTO 5-12-130 Landlord Remedies:(e)Abandonment.

That said, your best bet is to get on the phone and start networking with contractors and looking at their work (go to their jobs) and finding out their pricing and what they are charging for the flips you're looking at. 

I know it was not but don't know if I can charge this and how much?

If you need to pay them back over a 2 year spread or when the property sells then I would charge them for the time it will take and the attorney fees for each and every deal you do with their money.  

Any contract that has experience working with HomeHQ will charge you top dollar for the remodels.