Creating a Memorial on a Tight Budget

Hi all, I'm genderfluid and just this last July lost my transgender husband of 7 years to a long battle with Interstitial lung disease. We were a pansexual polyamorous couple and we're dating my best friend and a alter of mine. My husband left behind 3 partners. Myself, our girlfriend, and our alter boyfriend. We're finally after being homeless after all this- moving into a new place. We've had so much help from so many amazing people. HUD, churches, and even a therapy place have made this all possible! This new place is everything my husband and all of us had dreamed of. He just... isn't here and it's hurting us 3 so much... We're down just to my disability while our girlfriend struggles and fights to get on her own disability. So we are on a super super tight budget constantly. So my question is- how do you make a memorial for someone in a new home on a tiny budget?