@Don Johnson
Check your parking requirements for point #3. That will determine what you can actually build on site to reach density... and then consider if the cost of underground parking will be worth the cost to add the units.
Then do some very rough napkin math,
Determine your footprint and how many floors you can do within the height restriction of the zoning. = Total sq ft.
Then determine your usable sq ft. from the total sq ft. calculation, ideally you want to aim around 74% usable space. (More the better) Total sq ft. * 0.74 = Rough Usable
Then determine your rent per sq ft. of usable space. Then take your usable space and determine your gross rent for the building. You can also use these to determine the sale per sq ft. (Condos & SFH etc)
Then calculate your hard cost and soft costs and include your land cost. I use 30% of hard cost as the total soft cost in multi.
Once you start making sense of those basic calculations you can start solving other pieces of the puzzle.
1. Consulting can save you a lot of time and costly mistakes in your earlier projects. Then once you see how they do the numbers and get experience you can start to take on more yourself and not use them for other projects down the road.
2. The first step would be to determine if you have a viable project, once you start engaging an architect and the like they will start to bill. Architects will draw until the end of time and can become costly if you're not clear on the project and also hiring the wrong architect that doesn't have a track record with the type of building you want to build will be costly. (They will learn how to do it on your dime)
3. As much as real estate is hyper local, the proper team can be located anywhere. However, using locals that are familiar brings a significant advantage since they are familiar with the key players in the area.
4. Unit mix should be market driven and keep in mind there may be benefits to having a % of the building affordable and accessible. Keep in mind you can get more clever base don the shape of the building. Studio, 1 Bed, 1 Bed + Den, 2 Bed, 3 Bed Penthouse.
5.