That give good analysis on ARV4.

They are great for small projects. 

If you believe that things are as they always will be, (first you should look at the past and see if that is a reasonable assessment of what the future brings) then taking into account: limitations on what you can invest in, your Solo 401(k) "projected" growth, fees & hidden fees, you can't co-mingle funds, you have to carefully manage the process, future tax increases, tax law changes, a national debt that is north of $22 Trillion dollars, unfunded liabilities and and of course inflation, along with possible "bail ins" then you are well equipped to decide if that is a good choice for your style of investing.However, If you are an "opportunistic investor" . . . . you jump at the opportunity when it arises, then you run into some conflicts.

As many of you know, I've been in this business for many years, developing many types of projects over the years with my husband.

For DTI projections on purchases they will usually use either 75% of appraised rent off the appraisal, or current rent documented on a lease, whichever is LESS.

The calculators and analysis tools here are only helpful to me once I figure out where my minimums should be - I just don't know how to figure that out.

Take every opportunity you can get to visit another investors project ans pick his or her brain about the repair numbers.

Depending on where your project falls in the above spectrum, we use different companies. 

While there are a lot of factors, there are a couple sites that give you at least an estimate to make some projections.

She's saved up a good chunk for retirement + pension and wants to use it against her rehab project, but I don't think it's a good idea and I can't talk her out of it (neither can her sons).Any advice?