and if the property is 3 units, but i am doing a large reno on only one unit, can i get away with just making that specific unit lead free or would i have to make the entire 3 units  lead free in order to qualify for lead free at that address?

You should speak to an real estate lawyer before purchasing this property. 

Another big factor is which state the property is located. 

I am considering getting a HELOC to pull 75-100k for a 25% downpayment on a rental property. 

Whatever reasons you come up with could apply to properties that cashflow. 

Half of my properties in the Smokies are under the vineyard category.

I recently bought 2 properties.

Myself =DChristian Petrozza, RealtorNulf Management Services, a PA-licensed GC

I’m interested in purchasing a rental property and or properties if I can find the right deal.

Just like with multifamily buildings, the more modern and move-in-ready a property is, the less potential there is for adding value, which can limit your return on investment.I suggest looking for off-market properties.