Pimp my mom's backyard

Hello Gofundme, My name is DJ and my amazing Mother's Birthday is in a month. For her Birthday I wanted to dig her a pond in her backyard and my brother wanted to make a deck for her. Small problem, we don't make nearly enough working to make it, and if we had mom fund it it would not be that much of a birthday gift would it? She gave me life and has helped me soo much over the years, and we just moved and had a lot sent on home improvement in our new house, but that's all from her pocket, I want to return the favor with the best gift possible. 

The money will go to koi pond supplies and deck materials. for example the pond liner material, the pump, the fish, the water treatment, and plants. 
for the deck, wood and assembly materials. 

My mom has degenerative disk disease and plates and screws in her spine, she is not easily able to find work and she lost her mom last year, and her grandma a few months ago.  it may sound like a sappy soap opera but there is no hyperbole here. she is still in mourning and i feel this would brighten up her life. 

PLEASE HELP ME GET THESE NICE THINGS FOR HER.