Although I like to think that I pause and be reflective before offering advice to anyone IRL or online. I have to say you have so much more going on here than wanting a baby that I have retyped this message three times and sat looking at the blank box wandering what to suggest first!!!!
Honestly, although I haven't noticed that you gave your age I really hope you are not feeling the time pressure because there are lots of things here that need resolving before thinking about bringing a baby into this situation.
I know you say you love him but this love is not the partnership it should be. You are infatuated maybe, cant see how anything could go on without him maybe. He seems like the centre of you life but you are not the centre of his.
I think you really need to get some marriage guidance irl, together, but go on your own if he wont go with you. His attitude to money and possessions between you is not healthy and needs looking at as does his attitudes to your wants and desires as you really don't seem to want the same things at all.
My advice, do not put a coil in, especially one that puts chemicals in your body, or take any other chemical birth control if you are serious about wanting to start trying for a baby. There are other methods.
Focus first on getting yourself fit and healthy in body and mind, getting yourself stronger and making a joint plan rather than pulling apart. If you cant agree on a joint plan then you need to walk away. He does not call all the shots, there is never a right time to have children, there will always be other things to spend money on. Is he scared of something? All this needs to be explored but my fear is that there is not a happy ending here. Although I would be happy to be proved wrong!