Hey @Mike Primsky! That's a very fortunate position that you are in currently and congrats on the success with the Fix and Flips. As for your analysis of the Denver market, yes, if you are trying to purchase a traditional Buy and Hold with long-term renters, the numbers can be hard to make deals pencil. I would second what @Jaron Walling asked and need to understand your goals. Cash flow is only one aspect of the investing journey, and in the current market you either need to get creative (MTR, STR, or other strategies), put more down, or look at the big picture of a real estate investment. Cash flow is not what creates generational wealth. Take a look at the tax savings, the appreciation, and the loan paydown. These are all things that you'll get in excess here in Denver, vs the midwest, where you may walk away with $200 a door a month.
I still have investors creating cash flow and generational wealth here in Denver, and depending on your situation, lending ability, and so forth, your $500k can go far. One of my favorite strategies for clients nowadays is a small multifamily property, and doing a hybrid MTR/LTR strategy. We just closed a quadplex like this the other week, and that will generate a 10% COC once up and running.
Don't limit yourself by saying the Denver market doesn't work, there are numerous investors still making a lot of money in this market. and since you have the knowledge and connections here, you are in a good position to build some wealth!