I am still upgrading my DH myself but besides having a little low health and maybe res too I am comfortably farming MP7 for a while now.
http://eu.battle.net/d3/en/profile/C.../hero/20693642
Personally I would forget about MF as You move along in upgrading Your gear, when playing at MP7 I believe I have +300 MF at NV2 on paragon lvl 26 while I only have +19 MF on my pants.
Regularly checking AH and sorting stuff on both buyout and time remaining besides the stats You are looking for also helps to find a bargain now and then,
as my last upgrade costed me 420K only (pants).
Other than that upgrading Your gems as was already advised by others is always a good thing to do. Personally I prefer farming/crafting gems instead of buying them.
This might takes a long while but it will make a difference in the costs. Still, check out costs of gems on a regular base, sometimes You can find radiant or square emeralds at a fairly reasonable price making it worth to buy a lot and save some time/gold.
Btw, only 43 million gold is probably more than the total I have spent on my DH