I was going to also increase their late fee significantly or to accrue daily, but a new law in CT just set the limit to $50.

Do the banks/lenders have the option to pay you back, with interest accrued or you get the property?

Hi, I bought a property on a 1st loan mortgage foreclosure. There is HOA debt in the amount of $21k piled up from previous owner. Who is responsible to pay for the HOA debt that piled up prior to foreclosure sale? Me ...

Even a mortgage holder, is not entitled to rents from real estate until a foreclosure has been completed.Mortgagee cannot maintain action for Possession, (or) to collect mortgaged, pledged, or assigned rents and profits“Until paid, the rents and profits of real property constitute real property for the purposes of mortgages, trust deeds, or assignments whether or not said rents and profits have accrued.

The losses accrue until I either have a profit to net them against sell of the property (which I am going to buy and hold). 

This could be as high as 18%, per the statutory maximum from FSS 197.172(1) or, very often, as little as 0.25%.197.472    Redemption of tax certificates.(2) When a tax certificate is redeemed and the interest earned on the tax certificate is less than 5 percent of the face amount of the certificate, a mandatory minimum interest of an absolute 5 percent shall be levied upon the face value of the tax certificate. [...]Translation: When a property owner pays their delinquent taxes and thus redeems a tax lien certificate, if the certificate has yet to accrue a total of 5% at the rate at which the winning bidder won the certificate, then the winning bidder receives 5%.

@Kenny Simpson The latter, I believe the main bottleneck for scaling a portfolio using Conventional products stem from accruing recurring mortgage debt payments. 

I think there's a time to either cashout refi or sell but that is when you've accrued enough equity to parlay that into two more properties (which usually take about 5 years or so depending on the market).  

Supposedly the pref accrues and will one day be paid out along with excess cash flows but it’s too early to tell.

If you miss the payments on those 0% all that accrued interest at stupid rates will destroy you and set you back five years from getting a place (easy).