Your glutinosa (and other Chilean varieties) are rated more tender than my plants that are hybrids or purely Tasmanian/Australian (intermedia, lucida, etc.) Most literature says to protect them from strong winds, but I get east winds here and only notice occasional tiny branchlet breakage, no individual leaf damage. Leaves turned brown by low temps fall off in spring, are replaced readily by May. If your two proposed locations are about equally cold in the winter, go with the mid-morning...late afternoon one with wind exposure, that is where mine are. You may want to mulch and cover up your plant if it is very small for the first winter if temps go below 15. I put a sprinkler under my eucryphias every two weeks or so during hot summer stretches.

I have never seen Fortuniana set seed anywhere I have encountered or grown it. Fortuniana is considered to be a cross between R. Banksiae and R. Laevigata, therefore a hybrid which would not germinate true to the type from seed. So, no, IF you could find Fortuniana seed, you would not be able to raise the exact rose you are looking for from its seed. And, I know of no source for Fortuniana seed as it has never set seed in my experience. Where are you located? You may be able to obtain cuttings, depending upon where you live.

I recommend Johnny's Select Seeds. I remember seeing wildflowers and mixes on their website in 1, 2 and 5-pound bags. Not sure what they have available now, but their quality is outstanding.

If you are willing to drive to North Edmond, they have seed potatoes at the local co-op, Conscience Community Coop. I saw them post on fb the other day. Seemed like they had a lot. They are located off of Waterloo Rd.