Even if you rent to someone who doesn’t have full custody of their children, you need to delead if the children will be staying there regularly, such as on weekends.

Those are properties/parcels that didn't sell via the regular tax sale. 

I am thinking of converting it to a regular apartment so rents can be raised easier and increase the sale price in 2-3 years. 

I always recommend accepting pets, but you should know how to screen them, monitor them, and have strong policies in place to stop problems early.You should regularly monitor your market on Zillow, realtor.com, apartments.com, etc.

Unfortunately it’s not capital gains because you owned it less than a year, its regular income tax.

Was this on a regular interior lot where the garage was behind the house or was the garage on the side of the house; was there an alley behind?

This happens regularly, according to the on-site care taker of the property.

Ive used Identingly.

If it is rated for a 3 bed, but it's not getting super regular use because of vacancy, then I don't know if I would be too worried about it.

Inspect your property regularly and hold tenants accountable before the problems get out of hand.