My goal is to learn as much as I can, connect with experienced investors, and start building my portfolio.I believe wholesaling offers a great opportunity to get my foot in the door without the large upfront capital required for traditional investments.

I wouldn't use them to complete the job, they've already shown they aren't doing quality work.

This is assuming you haven't already done this during college (summer job or working part time)I would go where I can get a job in a commercial real estate firm. 

Adjusting the purchase price, budget, and offers can help you reach the break-even point.Many calculators overestimate cost assumptions or rental comps, which can be both beneficial and a hindrance.

& track my job costs against each category so I can compare my budget vs actuals and calculate the variances.For example:Electrical Budget: $4,000Electrical Actual: $6,300Variance: +$2,300This process is more tedious because you have to breakdown each invoice or receipt and allocate the costs to each Category, but it really helps you understand where you are spending your money and why you went over budget.Otherwise, it sounds like you are having trouble measuring employee productivity?  

Did you go to School and get a Degree that gave you a JOB?

Don’t buy more than your job can support. 

I then created an excel sheet with those estimates to know (a) what to offer for land to make my numbers and (b) to hold the sub to what they estimated for me.  

Multifamily offers steady income, scalability, and tax advantages, though it requires more upfront capital and management skills.

Heal fast and great job!