DIY 250-400 size w/ extra camera, 2200mah preferred

What is your budget for this multicopter build? For the quad itself, maybe $400-500. Hopefully ~$800-900 for everything, including FPV goggles/batteries

What type of multicopter would you like to build? FPV Racer with a gopro-like camera (not a gopro), H-style. Focused on flight longevity over racing agility

What is the purpose of this multirotor build? So I can both do FPV racing/flying, but also just fly around at a relaxed pace and explore/film stuff. Not in an APV type of way

What type of build will this be? wtf lol? What is the difference between the last 2 questions? Its DIY type?

What is your experience piloting RC multicopters? What about single rotor/RC planes/other RC hobbies? Nano QX and 200 QX for quads. I fly a lot of CP helis and can fly minor 3D (flips, rolls, inverted hovering/some flying). So I am very experienced for this sub lol. Nitro and electric cars as well. Building won't be a problem (although I suck at/hate soldering), and neither will flying.

Optional Questions

What country do you live in, and do you have any additional shipping/sourcing requirements? US- Nope, I live in CA.

Additional comments

I really want it to use 3s 2200mah batteries. I don't care too much about size- I'd go 250 if that can support a 2nd camera and 3s 2200mah batteries, but if not then I don't mind going 400 size. 3s 1000mah would be another preferable battery option, although not as much as the 2200mah. Plus with what I know about quads I’d assume 2200mah would be best for the type of quad I want (2nd camera, longer flight times)

I probably won't ever race with anyone so I don't care so much about race specs/speed as I do about using the 2200mah battery and a gopro-like camera on top of the FPV camera with decent flight durations.

At most I will probably just “race around” stuff, in other words just fly really fast lol. But I also want to do more relaxed flights too, and possibly some exploring.

The QAV400 on getfpv looks like what I want, except fuck paying over $700 and it may be a bit too big as I see it takes a 4s 3300mah batt.

This build also looks like what I want, except I can't find the specs for that lol.

Edit: If someone can come up with a great build fitting what I want in terms of longer flight times with the extra camera, those 2 are highest priority so if it would take a different battery to do that I am fine with that.

Edit Edit: I already have a spektrum DX6 that I will most likely use (considering a taranis x9d, maybe in the future). As you may have guessed I am good on chargers and if it is a 2200mah batt, I am good on those too lol (I have over 10, which is why I'd like to use them on this build haha. Plus I have WAY too many lipos already...).