Setting up Analog In a New Room From Scratch

I am fixing to move to a different house in about a month. Where I am now, I have been restricted about where I could set up my system and I am doing the old everything on a rack between and behind the speakers setup. In the new place, I get my own room to do what I want and it is 20 X 16. I plan to use one of the long walls for the speakers.

I want to set up my turntable in the best spot possible, but not in another room like some do. Getting up at all is enough sacrifice for me, I am not trudging back and forth between rooms. Now, I get a bit of rumble if I turn the gain up too high, too quickly and figure that slightly bad bass response results from room interaction. Where is the best spot for the table? On a side wall? If so, at mid-point? Some point of minimum reflection? Back wall? That would seem worse than behind and between the speakers. Something tells me that corners are out, too. I have a wall mount for my table that is about 42 inches high.

Also, I have 10' speaker cables that cost me more than I want to admit. If I locate the table (and other components) somewhere farther than 10' from the speakers, am I better off to adjust by:

1) Locating just the table in the best spot and then running longer phono cables to my phono stage, located with all other components (but not between the speakers)?

2) Locating just the table and phono stage in the best spot (to minimize phono cable length) and then running a longer IC from phono stage to preamp where the preamp is placed near the amp and so that the preamp to amp IC remains at 1m and the 10' speaker cable length is sufficient to reach the amp?

3) Locating everything in the same proximity to each other and getting longer speaker cables?

4) Some other option?

Thanks