That is both true and a lie. It's the kind of stuff that mortgage brokers and investors tout, but the reality is something else. You're right about lower interest rates can have a huge impact on monthly payment amounts, but saying you can buy a $140K house for $805 monthly is just crack-addict talk. Once you add home owners insurance (unless you can actually come up with the $28K plus realtor fees) and factor in your property taxes, you're more likely looking at closer to $1300-$1400 a month.
My wife and I make decent coin (ok, I'm a student, but she makes decent coin as a nurse practitioner), but there ain't no way we can see being able to budget more than $1100/mo for rent/mortgage for a good while yet. What will $1100 get us? $120K home including homeowners insurance and property taxes. $120k just don't buy what it used to...