Priority #1 -- Create a design priority list. What are the" must haves" & the "I can live withouts". Find the items you love in an average retail setting. Then create a comparative price list through resale, homemade & borrowing.
You may find resources through friends, relatives, Craigslist, resale & garage sales -- be general in your search. Below are a few links to help you make budget decisions. You don't have to compromise your design or your budget, to get what you want.
If you are not crafty -- become crafty! You can find any DIY on YouTube. No excuses!
Dollar Tree Wedding