How would I qualify for a conventional mortgage if there are multiple units (fewer than 4) for either a primary or second home?

Conventional financing was used and the down payment was small.

After applying for a loan on a place, I was told I am $121 /month away in income to reach the DTI requirements that a conventional mortgage has.

You only really need hard money for a property that needs rehab or if you can't qualify conventionally.

To finance a deal like this, you need hard money or private money, the home will not qualify for conventional financing due to its condition.

Seller needs cash for new business venture unrelated to real estate and wants to sell ASAP.If cash offer is not doable - would you offer high earnest money deposit ($100,000) given to seller ASAP and finance the rest with conventional mortgage in exchange for lower purchase price?

Wondering if anyone has experience and commentary regarding costs versus conventional construction.

I'm wondering why most people don't BRRRR with conventional loans with 20% down because to me it just seems like the better route to take because you can put less money in deals and still cash out refinance all your money, right? 

A partner and I split this deal, and we went into it with a conventional 25% down mortgage How did you add value to the deal?

I'm long since out of conventionals.