Need to maximize efficiency during unit renovations. Please help

[Eric Hathway]

Hi folks, I am a buy and hold investor but I have been renovating outdated units as the become vacant in order to increase rents. I generally do flooring, paint, fixtures, bathroom vanities, countertops, sometimes kitchen cabinets, and appliances (if they need it).

I use one general handyman that does basically everything. My problem is that this system lacks efficiency. He gets bogged down with maintenance calls and the renovations are taking too long so I lose a month or longer of rent. A problem I am running into is that his prices and dependability are hands-down unbeatable.

Do people have better success hiring out renovation jobs or delegating maintenance calls to someone else? How about having a flooring guy, painter, cleaners, etc? Maybe have the maintenance man hire subcontractors?

Is there an industry standard system along those lines that the pros use? 

Any good books on the subject?

Huge thanks in advance!!