I drive with portable hand controls and they are okay. They aren’t the safest and you have to make sure they are tightened before you drive. Portables are defiantly not as expensive as permanent ones. I use an off brand Freedom Staff that I got for around $100 at the time. Amazon has the actual Freedom Staff that costs a little more.
You would only need a professional if it's a permanent mod to your car. If you are able to transfer in already you are ready to drive. I'll link my adapter on the bottom but it just screws into the pedals. I had to have my dad install it because I couldn't reach down there but once it's on you are good to go. Loading the chair is a pain and you will probably mess up the interior a little bit but you get used to it. This was another thing I was going to make a video about but I haven't had time to really start any of this.