During the rebuild of the '78 Sovereign
below, Mary and I tried several bed layouts, started with the twins, went to an East-West King, tried the "all bed" rear bedroom, went back to the twins, finally decided that an East-West Airstream shorty Queen with rounded corners worked best. The main problem with the King and All-Bed layouts was difficulty in accessing the bathroom at night and the problems with making up the bed.
It is difficult to determine if you currently have a rear bath or a mid bath. It will be outrageously expensive to convert to a center bath if in fact you have a rear bath. Could you please post more pictures?
There are several people in your area capable of doing just such a redo as you are describing. Check the search function for independents in the San Antonio, Austin, and Waco area. I think you will find that your time frame is unrealistic.
Look and read many of the rebuild threads. If you intend to keep your Sovereign
for a long time, it would really pay to get EVERYTHING done on the chassis and underside prior to tackling any topside renovation.
Let someone who has already completed a renovation or two look at it, and pay attention if they point out floor rot or possible problem areas with the frame.
Don't mean to rain on your parade, but I'm sure you want the unit to be in
top shape prior to taking it out on the road full time. Rest assured, working on and rebuilding the unit while you are living in it is extremely difficult.
Search the forums and read as many of the rebuild threads as possible, especially the ones on the larger units of the mid 70's to the late 80's and you will get a better feel for the magnitude of the job you are describing.
There are many Forum and WBCCI rallies coming up very soon. Plan on making a drive by to as many as these as you can and gather as much information as you can from your conversations. Most everyone in the Airstream community is willing to share their knowledge with noobies.
By all means, please document your decision progression in your blog - everything - thought processes, ultimate requirements, areas most likely to be visiting, living, travelling, prices, contractor selection, and build time.
Everything you will do could be very helpful to those needing to do the same thing a year or two from now.
Good Luck. Document, record, and publish here in your Blog,