Quite possibly the single biggest misconception that gets investors into trouble. https://www.biggerpockets.com/forums/311/topics/1216224-advi...I'm not suggesting that buying at 700 to 75% ltv is a guarantee at anything. 

Most of the time you'll be fine, but when something bad eventually happens (with enough exposure over time, you are virtually guaranteed to have something bad happen), the outcome is likely to be catastrophic. 

Try searching buy house with section 8 voucher in "your state" and see if your states web page pops up with this information.

If the 10 year treasury is at 5% which is guaranteed, investors will want a risk premium for the mortgage backed security which here is a great article on it. 

Quality homes in B or better areas, with guaranteed long-term tenants in place.

The quick good/bad of Section 8:- S8 tenants tend to be rougher on the property (but not always)- Paperwork/inspections/etc. can be burdensome and tough to navigate (especially initially)- People often think FMR rates are guarantee rental rates but that's not the case- Usually the rent isn't 100% subsidized and a lot of people don't realize this- S8 tenants tend to stay a lot longer than cash tenants- Obviously, the guaranteed rent portionOverall, I'm neutral on the program.

Since appreciation isn't a guarantee I don't ever bank on that when crunching numbers.

Most new investors look to Section 8 for "guaranteed money" and think it's easy.

You can't count on a guaranteed annual increase in rent. 

A few things to note- Know the market value of your rental, because I guarantee your tenants do. - Your expenses don't mean anything to a tenant.