Some of the main variables in my projection models include: expenses (broken down into various categories like personal expenses, capex, debt service, vacancy, etc.), income, cashflow, debt, DTI, equity, property appreciation, rent appreciation, mortgage paydown & amortization, rate of net worth growth, cost of living increases, hours worked per week, cash on hand, etc, etc. 

There are so many variables in the US right now that could affect the outcome of this but in the end, if you build and end up with the amount of equity you think you will have, you should be able to sell it if needed which mitigates the risk IMHO.The bigger the risk, the bigger the reward. :)

To keep both actual and prospective return higher the GPs stayed with variable.

Shut-up 20,000 economists screaming at the top of their lungs for years, we can't hear the banker on our I-phone 14 super Max Pro telling me about the 2.5% variable rate Bridge Loan he can get us for 24 months to buy that 50 unit crack house, grow house, section 8, Multi-Family first time syndication I put together after my Doge coin "investment" shockingly went Tits up! 

Besides whether this can be permitted by-right, the site work and type of structure are huge variable as is unit type.

As for these variable expenses I've listed some below. 

There are a lot of variables to take into account and a pro will know how to give you the best estimate of what the home will rent for, especially in different kinds of market environments. 

as I'm catching up to this thread... couldn't there more use of variable commissions?  

I haven't used a line of credit for, so I'm not sure what I should ask for and how different variables affect the rates and terms.3) People have mentioned a portfolio loan to me, but I'm not sure if they mean a line of credit on the portfolio for each company or some other type of loan?

I'm spending more time trying to understand and interpret all of the variables and inputs than I am in analyzing the deals I have on my desk.