Do you want your kids to buy a $125 Wal-Mart instrument or buy a quality horn? Why would you do the equivalent job your sound treatment?
Ask it to be added into a renovation budget or invest $2k a year for a few years and pay in installments. Fundraise for it. But do NOT do it in half measures or YOU WILL regret it!
Source: Guy whose district slapped CARPET ON THE WALLS for acoustic treatment, yet now/still has profound hearing loss a decade later.