I'm currently looking at a Multi Family deal with Victor and Y Street Capital and was hoping to connect with someone that has worked with them in the past.  

I do not understand your remark as related to the DSCR loan.  2 ADUs are not allowed by f/f conventional financing but is not always enforced.Fortunately if you stay with the current tenant without a refi, by the time you pay principle it is likely the rent will have increased enough to absorb the increase mortgage payment. 

Currently, my partner owns 100% of the shares based on him putting 100% of the cash (let's say $1,000,000) into the property.

If your current photos are performing well, you don’t need to change them often—just refresh when there’s something new to show!

Many of these lenders allowing 2nds behind them are more expensive capital (10's - 13's in our current market [high rates - but now showing signs of coming down]).

I'm currently projected to earn 15% for my first year.

Currently $2.2 trillion worth, in fact.

It's eating away every bit of cash flow from the property and then some.Both units currently have baseboard heating - which I've heard can be on the more expensive side of heating options - but I'm not sure if this amount is realistic for the area, or if there is a better heating option that I should look into for a reasonable cost.

It enables us to keep our money working at our current rate, and it puts more money in the hands of the rehabber.

Bought under value and currently adding a couple more homes and have brought two new tenants in as well What was the outcome?