Of course want better close rate but when those numbers I would be ok with 

Just completed my third self-storage conversion in October with my W2 job at Elm Builders.

While the cost can vary depending on the scope, zoning, and materials, I’ve seen similar projects run anywhere from $50,000 to $150,000, depending on factors like plumbing, electrical upgrades, and structural work.If you’d like, I can connect you with a few contractors or architects in Chicago who specialize in basement conversions.

Is this a conversion that will also require substantial renovations?

Conversion of LTR into furnished MTR and STR What was the outcome?

Working to figure out which route has the best conversion rates when targeting specific neighborhoods.

There are too many factors to consider to just provide base rates for what you're asking. 

Investment Info:

Small multi-family (2-4 units) note investment investment.

Purchase price: $80,000

Cash invested: $80,000

This is a reno- adding a 1 bedroom unit to a three family home. No a quad.

...

If you build a relationship with a Banker you can call and have a detailed conversation about rates.

Flat rate.