It’s very easy to install house letters if you want to install them yourself.
Please see a letter section on this page:
https://www.lawnbagsigns.com/house-letters.php
We provide a printed template and you need to drill the holes through the template.
You screw 3/8″ metal studs into half-drillerd holes at the back of the letters and then using silicone put the studs with the letters into the wall holes and let the structure dry out.
A house letter set without installation is $150.00. Do you want me to ship it to you when ready? If so, let me know your address (or you may pick it up when a house letter set is ready).