Sometimes a Solo 401k can help with this compared to an IRA.

Create a simple spreadsheet or written list to compare the features of each and identify the ones that align with your requirements.

I was thinking of selling, then buying a property to build on, while investing else where, but Im just wanting to get opinions from what other people think of the situation and how it compares to the whole market entirely. 

We recommend you get management contracts from several PMCs and compare the services they cover and, more importantly, what they each DO NOT cover.

I'd recommend pushing density to 3 or 4 they all finance the same. we picked 3 because of the 35' height allowance in our area. here is a rendering to help paint the picture. our target appraisal value is 550k on the first few and pushing them to more than 600k as we sell some or keep them but if you are the only one building multifamily it's important to highlight the importance of appraisal and selling or disposing of some assets to create comparable to be used. our market has very little 2-4 units built because of economies of scale we are the only builder doing this style and we control the full process and it is a high barrier to entry where we are at. we are able to build at a lower cost now than almost buying a duplex because they are so small. each one is 668 sq ft total of 2004 sq ft. 

I'm basically looking for the following fields (or whatever I can get):- Median Sales Price- Median Rent- Vacancy Rate- 5 or 10-year Property Value Appreciation Rate- Any historical values for the above to compare against currentAny tips/bits of wisdom folks can share would be appreciated!

Consult with local agents to learn about market trends, specific neighborhoods, and recent sale prices of comparable houses.

Compare to the tax returns for some degree of confirmation.

Same thing might happen with the vacancy if you have 2 months for lower end instead of 1 month for better area.I would use higher percentage for repairs and vacancy in lower end area when you compare CF for the 2 properties.Even in higher end area this year I had 2 evictions and one of them with 6 month vacancy and over 12k in damages, bad things can happen in both areas, the important thing is to keep cash reserves so you can get over unexpected expenses.

Property values are usually flat for this reason, compared to better locations where more people actually choose to live.