offer equity for work-good or bad idea?

[Marci Stein]

i have a handyman (house) in mind , also a handyman ( (person),

that i'd like to set up a deal-- he does all the work, about $40,000 worth, (same as the p.p.) and we share the money after sold.

i've worked with him before, but not in this way, i always paid him after a job. 

i like his work but wonder if there are any problems with this arrangement?