Does anyone have experience with financing for a new modular they put on land they already own?

Based on the above projections I receive, I then "run the numbers" to see where I project to end up each month. 

The profit should be split based upon whatever agreement the two of you come up with.It would be unfair for you to put in the majority of sweat equity as well as the training involved to have a 50% profit split.

Looking for a consensus, "Would building a home on an empty land lot be more profitable than just selling the land?"

Raw land alone is selling at 100k per acre in his area.

If you are talking about a subdivision, do you already own the land? 

payment based on performance?

You'll likely want to start with reviewing the requirements under Prop 19 for retention of the base assessed value when adding a child to title, and also look up the rules for a basis step-up at death. 

If you are going to do this type of business make sure it is in an area you can visit or make yourself familiar with, you have someone that is representing YOU at the table like your Attorrney, and you don't make decisions based on "we need to wrap this up". 

Here's a case study that would be dismissed based on your criterion:-Asset: Mix Use 11 Unit Building-Contract Price: $1.73M-Existing Rent Roll $15,800*Currently 1 vacant commercial space market rent $5,500 & 9 apartments all leased below market value (60 day termination provisions for each residential lease). -$650,000 Renovation Budget-Stabilized Rent Roll $25,400-"As Complete and Stabilized Value": $3.45MThat's a recent MLS deal in a B+ Philadelphia location with a credit tenant that's been there for 20 years in the occupied commercial space.