Mine ended up falling a little higher than your estimates, but I built a pretty similar garage gym, designed around doing Stronglifts.
I would warn you about the wall-mounted folding racks - most manufacturer's (especially Rogue) do not recommend the use of safety or spotter arms in conjunction with the wall mounted racks, for fear of the rack pulling out of the wall if you dropped a loaded bar on the spotter arms. This was the reason I ended up with a regular squat stand, since I often lift alone.
Here's what I ended up with (most of this was 2016 pricing):
RackCraigslist - Rogue S-2 Squat Stand
$350.00
http://www.roguefitness.com/rogue-s2-squat-stand-2-0Rack AccessoriesRogue Infinity J-Cups (2nd set)
$65.00
http://www.roguefitness.com/extra-infinity-j-cup-setRogue Spotter Arms
$166.32
http://www.roguefitness.com/set-of-safety-spotter-armsRogue Dip Bar
$108.92
http://www.roguefitness.com/the-rogue-matadorBench:Craigslist - Rogue Flat Bench 2.0
$100.00
http://www.roguefitness.com/rogue-flat-utility-benchFlooringCraigslist - Tractor Supply - Stall Mats (4)
$50.00
http://www.tractorsupply.com/tsc/product/rubber-mat-black-4-ft-x-6-ft?cm_vc=-10005BarbellCap OB-86PBCK
$180.21
https://www.amazon.com/gp/product/B006R4EOXMBarbell AccessoriesCap 2" Collars
$7.35
https://www.amazon.com/gp/product/B000BJKWXKRogue Mini Deadlift Bar Jack
$62.50
http://www.roguefitness.com/mini-deadlift-bar-jackPlatesBolt Rubber Coated (445 lbs)
$1/lb
https://boltfitnesssupply.com/main-product-id-73-lightning-rubber-coated-weight-plates-boltRogue 1-1/4lb Change Plates
$19.20
http://www.roguefitness.com/rogue-olympic-platesStorage AccessoriesWall Mounted Plate Racks - Custom made, local machine shop.
$120.00
Rowing MachineCraigslist - Concept 2 Model C
$600.00
https://www.concept2.com/service/indoor-rowers/model-cAll in, I'm right at $2,300, including the Rower, for which I likely overpaid for the older model. The Bolt plates were from a local Houston outfit that was operating out of his garage at the time, and the stall mats, squat rack, and bench were all a local craigslist find.
This was taken before the rower was added, and I can assure you that the horns on the wall have in fact been sawed off.