[simplyaccont]

>True, but those linesets introduce other downsides. They can't be cut to length, so you often have to have unsightly loops of extra line set somewhere, and the loops can potentially trap the oils that mix with the refrigerant to lubricate the compressor.

well, i run my through crawlspace. had only a small extra loop. in crawlspace.

>They're also much more expensive,

per unit - yes. but... if you doing to diy mini-split not with precharged lineste, you need vacuum, refrigerant and probably license to buy it. it raises cost and make it viable if you plant to install multiple units (have coworkers that did it). if you want to get it professionally install, than in addition to ~$1.4k for 2ton unit you look into $6k-$8k for labor. Those were prices year ago for install in garage with 240v line connected to 40amp breaker available at install location.

>Not to mention, installing them without an EPA 608 certification is technically illegal.

technically, i guess much of the work done by home owners must be done by certified professionals and get approvals and inspections.