Advice needed - replacing MS with some other solution (SWM?)

The SWMs have been shown to support single receivers at distances of 400 feet, but if you start splitting the signal, you will probably lose around 40 to 50 feet of nominal, maximum length per 2-way split, because a 2-way splitter will probably lose between 4 and 5dB at 1800 MHz. You can probably extend that by another hundred feet or more with a Sonora inline amplifier that is specially designed to work in SWM systems.

There are SWM chassis that can support two, four or 6 SWMs, but they are very expensive. They only use four input ports to source 99/101/103/110/119, so 12 "regular" multiswitch ports would remain. I think the wholesale price on an FMC6 is still over $500.

But remember, if anything goes wrong, you are going to be the guy with the egg on his face, and probably the guy who will have to arrange and pay for a "professional" repair that might not go so smoothly, since most residential installers called out to service it would look at it and say, "What in hell is all that?".

You'll need 2 SWMs to support nine to sixteen tuners. The only question is how you choose to source them. You can put splitters on each LNB downlead and split each downlead three ways, to independently support each SWM and the multiswitch, or you can connect each SWM to four ports of the multiswitch, therefore expending half of them, or you can buy a 2, 4, or 6 SWM chassis, which has "through" ports on it, and connect the inout ports of the SWM chassis to the LNBs, and the output through ports to a 2 (or 4) input multiswitch.

I'm not sure if the 2, 4, and 6 input SWM modules can be powered through the tuner coaxes, so you might have to arrange for powering of those chassis through a coax dedicated to that purpose.

Last year, I "pre-installed" some specialty destacking hardware at a condo that has two stacked Ku band trinklines, Sat A and Sat B/C. I cleverly multiplexed everything using Hughes 2x1 tone switches and left a clearly written instruction for the DirecTV installer to just connect the receivers to the wallplates, which I had pretested, then go into the "hidden" set-up service menu and change the receivers to "stacked LNB". The note also said to call me before he began.

A few days later, I got a call from the installation tech, whio said he couldn't make the receivers operate. I asked him if he had found the note I left with my phone number on it, or if he just got my number from the customer. He said he found the note before he began the installation, but he didn't understand the circuitry I had devised, so he pulled it all out before he installed the receivers, and now they don't work. That is what you are looking at unless you can pre-arrange with a company that is familiar with SWM technology before you try anything any more complicated than connecting the two SWM to eight of the new, WB multiswitch's ports.