In addition, because their rent is high tenants don't stay as long further increasing the vacancy time by increasing the frequency of turnovers.

When calculating rent for a multi-family, does the rent estimator take into account the entire house or is that a per unit estimate?

When you raise the rent or have new tenants move in; Those are the periods you can expect the highest volume of calls, inquiries, or complaints about the property.

To get into real estate investing at a young age with strong credit, think about plans like living in one part while renting the rest, making friends in the field, beginning with bite-sized properties, using savings and credit well, and eyeing areas that might grow.

Income greater than 3x rent, 620+ credit score, etc. etc. 

I super managed the property – income, expenses & loan - and took care of all maint. and mgt. issues (the water damage was handled through the previous owner’s property ins. ) and brought the occupancy to about 100% while raising rents about 20%.

However, if they were renting the entire time they were fine. 

1. you're right in the new ones from developers don't produce any cashflow. you might want to look at the secondary market to get better yields as the properties are already built and can cashflow right away. also easier to see comparable rents in the same development. check bank repos, distressed sellers and the like. you might also want to get a parking slot for added income as they can be leased out separately. it's also quite difficult to sell without one should you decide down the road. developers usually have an in-house leasing team to handle property management which we use for some of our properties.  

I am looking at the following deal:Address: 4116 Jason Rd, Spring Hill, FL 34608Asking Price: $650,000Property Type: Multi-Family | QuadPlexBedrooms and Bathrooms: 8 Beds and 8 Baths | 4 UnitsSquare Footage: 4,644 Sqft | 4 UnitsCurrent Monthly Rent: $5,525"This property comprises two fantastic duplexes built in 2007, which share a lot and feature a private screened-in pool.

So my question is do I sell and take a loss of 35-40k, try to long term rent at around $2000/ month and pray for appreciation?