It's important to familiarize yourself with landlord-tenant laws in your area, and stay on top of maintenance and repair issues to keep the building in good condition.It's also important to thoroughly evaluate the financials of the building before making a purchase.

So then how do you get into land and tax liens without money? 

Maybe someone can tell us if we were supposed to pay the depreciation at the time of the purchase of the land since land cannot be depreciated. 

I highly recommend finding a market that is landlord friendly, cash flowing, doesn't have regular catastrophic events, property taxes are low, insurance rates are under control and you like the area.

selling said property, other than 1031 or doing a land contract AKA seller financing to avoid these gains. 

If you are a Landlord / Owner - you should WANT a commission based renewal fee. 

This is what I found below on an attorney's website"The contents of an estoppel agreement are conclusively presumed to be true and bind both the landlord and tenant.

If I was a tenant I wouldn't allow a landlord to connect to my wifi network for free.- Tenants should be wary of a landlord freely allowing prospective tenants to tour their occupied units without supervision.

VA is more landlord friendly.

I have a few clients who are trying to sell / buy land and mobile home type investments, I'm curious do you have a good source for things to know, the code for mobile home parks, etc?