Paying yourself for work on a flip?

[James Theron Erwin III]

I'm looking to do a flip soon and I'm going to do a good amount of the work myself. I have an established handyman business and a separate REI LLC. I would like to account for the labor I will be putting in. So my question is this, is there a way for my LLC to hire and pay my Handyman business? Is this legal? Are there tax benefits to this strategy? My original goal of the handyman business was to supplement my REI projects