I know you mean well, but it's not the right way to approach someone who is well past wondering if they are within their budget this month. 

My budget is between $400k and $500k.

If you do calculate make sure you add a adjustment after you file the tax return if needed.Can you do budgets, forecast? 

My most recent STR in Sacramento that I built did take a bit longer to build and was slightly over budget, however the returns have been great and revenue consistent.

It is for my budget purposes only. 

Execution - do you have examples of comparable projects that you executed, were they under budget, were they on time, etc.?

I have a rough idea of what my max bid would be if my reno budget is around 150k.

The budget I was planning on was between $150-175K for the ADU so I could use this as my primary residence as well as a chunk of money for a cash-flowing property.

Something good to keep in mind too is to keep a contingency in your budgets to ensure you've always got enough funded for the rehabs.Once you get a few under your belt then your LTV's will be higher and your rates will be lower.

Eliminate debt, establish a budget, and save.