Is your $1k budget meant for the food/catering alone or you're also including the cost of venue/facilities? If just food/catering alone, then most caterers have packages that can fit your budget. If you're thinking to also fit in venue/facilities, then you may need to consider where you want to host your solemnisation. A private venue may incur a cost higher than your budget itself or you will have to consider more affordable options like a community hall or HDB void deck... I can't remember the exact cost but if you're willing to fork out between $1.5-2k, you can consider The Colonial @ Scotts that can give you an exclusive unique venue for your ceremony plus utilities and catering included..