@Ray Hayward
I would start by defining a scope and creating an actual budget for the work to be performed. Doing a full-blown rehab is one thing, doing a quick cosmetic turnover (replace carpet and paint) is another. By defining the scope you can both agree on what needs to be done and create a budget, you can plug that number into your calculation and determine what the actual value is. The average cost varies by trade and the type of work being done. Two quick examples:
Changing a toilet
Labor = Assume 3 hours at $50/hr = $150
Material (wide range, assume something cost effective) = $150
This looks like a $300 job and a 50-50 split in labor/material
Painting the interior
Materials = $500
Labor = crew of 4 x 8 hrs x $30/hr =960 (Assume 1,000)
Total cost = $1,500 (Material 33%, Labor 66%)
In general, I agree with adding incentives in order to complete the work. On projects, where the GC is supplying the material/labor and carrying the cost the incentive is to get the work done ASAP in order to sell and recoup the investment. There are other things to be taken into account when determining an equitable split, including:
- Who found the deal?
- Who is financing/putting the down payment & closing costs?
- What is the extent of the renovation (how risky is it)?
- What is the total estimated turnaround (from acquisition to selling), how long does will funds be tied up?
- Who is on point to market and sell it?