I do it all. CDs, SACDs, Streaming. Not big on vinyl but I do have an analog rig that I use for LPs no longer digitally available or where I prefer the lp mastering to the digital rendition.
SACDs when done right can be breathtaking in their realism. Since you don’t own any SACDs, my practical suggestion is that if you buy a player, new or used, it isn’t going to get a lot of wear and tear for a while. If I was in your shoes I would buy the used Esoteric, because they are as good as it gets in SACD. Don’t waste money on an extra drive that you may not be able to install due to the reasons that the OP has identified. If it goes, decide at that time if SACD is something that you really need in your life. If it is, there will still be manufacturers. SACD is valued a lot more in the Far East than in the West so someone will be making them for at least the next quarter century