They buy properties, do not know the area put substandard upgrades in the property then sell them for market value or try to and the property sits for a long time.

Don't get me wrong:  cash flow is still an important factor, it keeps the lights on, it pays for repairs and upgrades.

They usually are high on estimated ARV and low on estimated upgrade costs.San Diego RE investing returns come from: appreciation, value adds, equity paydown.Value adds:Rehab: Standard BRRRRADU: have become popular in last 2 years due to changing CA ADU regulations. 

Looking to upgrade my game and speed is of the essence.

They keep rent low, give gifts and homemade cookies for Christmas, make upgrades whenever the tenant requests,  accept all the late rent excuses, etc.The truth is, your tenant is not your friend.

Sometimes they’ll let you add meters and mailboxes without rezoning, but that depends on local rules, so definitely ask.For the septic, upgrading is probably a must.

This is specific to this, I have the detailed 411 on this, including full background on seller, why selling, how things have gone, maintenance history and recent updates/upgrades such as the newer roof, HVAC etc etc etc... 

After 1976 trailers were considered mobile homes and standards were upgraded.

I want to upgrade my house up a notch in the couple years and get a couple little extras like that.  

I disagree sometimes there are other reasons to put in an upgrade.