Phew! I just read, I think, every response in this thread. Here is my take, do with it, what you want. I bought my house in 2008 for $141,000. Even then, I did not have 20%, so I did 5% with a FHA loan. I paid the PMI and easily covered my monthly payments. I was pre qualified for almost 300k based on my DTI as well as having an exceptional credit score. Times are different now, so my situation would be harder to come by in our current market.
Year 3, my house was worth enough to refinance and get into a conventional 30 year fixed loan, I think it was 4%. My income when I first bought my house was roughly 50k and my wife was also making 50ish k. We were young, we were both 23, she was still in college and I had graduated with some worthless degree I never used.
Fast forward to 3 or so years ago, I still live in the same house, it is worth $450,000- $500,000, I owe less than 70k and refinanced yet again to lower my interest rate and get into a 15 year. The rates had dropped so much that I was able to refinance into a 2.25%. My income around the time of my last refinance had more than tripled from when I first purchased my home.
I am not a fan of debt, my only debt is my mortgage ( which I could easily pay off, but my investments are doing far better than the low APR on my mortgage) I have a very healthy savings account and various different investments. I still drive a 2014 ram 2500 gasser that I paid 42k OTD in 2014. A good buddy who is very wealthy once told me, "you never finance a depreciating asset."
I guess the point of my long winded reply is waiting for 20% is a thing of the past IMO. As long as you can make the payments and have 6 months to a year of payments saved up in case of hard ship, do it. I personally do not believe Housing prices are going to drop any time soon. The saying of "Marry the home price and date the interest rate, is absolute truth." I have been "keeping my powder dry" for years now hoping to buy a larger house and rent out my current house. Just waiting for the market to drop..... It hasn't and if I would have bought 3 years ago, I would have paid much less than current prices. I hope I am wrong and prices drop significantly, but I doubt it.
Oh yeah, 1 more thing, I have never and I mean never, paid a single cent of credit card interest. I put anything I am allowed to on my credit cards and pay them off each month. Credit card debt is a no no and shows you may need to get your finances in line first before proceeding ahead with a Home purchase. I lived in 3 different apartments before I bought my house. IT SUCKED, but I was disciplined and knew I had to save up a rainy day fund so I could buy a home.
PS: Dave Ramsey is for people that have no self discipline.