Hi Janice,
Jolyn is right must list your priority first, ex. if you like nice gowns, good photography, number of photo, dress for your jiemeis, etc.
I am also having a simple church wedding, you can refer to my list as guide
Our budget is same as yours 3-4K
For PS - Our BS give me 2WG, 1EG, 3suits for htb, 2 add'l theme costumes, 5Makeup and HS, PG, bouquet, 1standard album, 1mini album, portait and table top
For AD - Our BS give me 1WG and 1Kua, 2suits for htb, Makeup & HS, bouquet, corsages and car decors, 2jeimeis dress and 2brother suits, 2 father's jacket
Then I looked for AD PG and VG, we've managed to stay in our budget by not topping up for any photo..