OK---learned a few things today at the dealer.
He said NO to plugging in the extra AC we are putting into the garage area, a 13K AC directly into a 15 amp. (using that converter 30/15 connector) He said the lowest is a 20 amp. he said I will ruin the ac long term and probably trip the 15 amp alot because of the 'big draw' of amps when it kicks on to cool. He said don't do it :) He said the kick on will be like 15-17 amps at least so best to go no lower than a 20 amp service.
hmmm he said I could try it but not to expect much and would limit the longevity of the ac in the end.