We get $2200 per month in rent from a traditional tenant. 

Im finding myself faced with the decision to reduce 401k deposits in favor of putting aside money for a down payment on a primary residence so i can get a house faster.

I love to see line item example between avg hard money vs traditional local bank?

We need more space.I'm here asking you guys because none of our family members are financially savvy to our knowledge.Our next move, is this buy our primary home and we trying to figure our the best way to approach this.

Cap rates are extremely important, primary importance to me, especially since CoC is only of relevance for about a year, Once appreciation takes place and your principal payments are paying down a mortgage CoC is no longer valid and will likely only decrease over time.    

What special rules do I need to follow (e.g. proper number and placement of smoke detectors and carbon monoxide detectors) that might apply to a rental property that don't apply to a primary residence, or where can I find these rules?

I’ve completely rehabbed multiple primary residences trading up each time.

Over the last few years I have been using flipping as a primary way of raising capital for my buy and holds. 

Over the last few years I have been using flipping as a primary way of raising capital for my buy and holds.

And finally, if they used a traditional P trap, you could buy yourself the extra room for appropriate slope with a low profile P trap.