I simply let him do the work and bill me after per the quote.Speed has never been an issue but if it was I would add a bonus for completion by xyz timeframe.

Any extra appreciation is bonus.

If they also do real estate investing personally, that's an added bonus (further alignment). 

Some expenses can be taken as bonus depreciation in year 1.

Get him to sign something saying he will terminate his tenancy on XX date and will be paid $1,500 as a bonus to help him find new accommodations.

If you can put your money into an asset growing a x% and you can get a line of credit against that asset, then anything you do with the loan proceeds by investing it is a bonus on top of the return on the cash value.Its much more powerful than simply buying term and investing the difference.

It can be a "bonus/storage" room if it's not up to par with the rest of the house.

In away its almost the same as investing in Stock / Bonds. you pay retail and get a cash-flow return. appreciation is only bonus.

Having a potential buyer and saving some selling costs is bonus.   

Hey Bp family, do you think its an added bonus or hindrance if an investor has their real estate license ?