I would be okay doing any of the grunt work doing a DIY system, but when it comes to the final hook-ups and preparing the system, I'd rather leave that to a pro.
But I will check them out! Thanks.
What you are describing is a " rough install " by the homeowner . I have done that at two different houses with great results . Here is what I did in both cases , your own ability will determine how much of the install you want to do .
1.Mount the outside unit , must be level/plumb with clearances per manufacturer.
2.Mount the inside unit again per manufacturers recommendations.
3.Run drain line,communication electric and power lines again per manufacturer . I ran everything from the inside units to the outside units but didn't terminate at the outside unit.
4.Copper line sets: I am NOT a fan of the quick coupler style I prefer good old fashion flares . So I had the copper line sets sitting and ready for the installer.
5.When I had all the above done I called around to various HVAC dudes until someone agreed to complete the job. I don't think any installer loves doing the grunt work their expertise is in the final setup .
My experience in these two jobs was with Mitsubishi 24K mini splits both purchased online . After the techs did their thing I was provided written receipts proving a " pro " installed the systems . In both cases I registered online with Mitsubishi and received email replies thanking me for registering for the warranty . Each email stated that my warranty started on the day of the install NOT the day of purchase . Just my opinion here but I don't think there is any difference between a tech purchasing from his supplier or a homeowner buying from an online warehouse . In my case both units were made by Mitsubishi and that's what matters , that plus a pro doing the final hook ups , pulling a vacumn and releasing the charge . That has been my experience and to date thankfully I have not had to use the warranty .
Last opinion: The only mini splits that I consider to be high quality are Mitsubishi/Fujitsu/Daikin . There may be others but that's where my money would go if I was considering a purchase .