Going in 12 days

first Disney trip' very excited.
Few questions that are prob repeats sorry
No need to apologize. Lots of questions/answers get buried in the many pages of the thread.
1. We have preferred room booked, is there any building/village that is better than the next that I can request. Def want first floor bc we have 2 small children. Would like to be close to buses, pool...
We've stayed in two of the Martinique preferred buildings....24 and 26 and both were close to the food court, main pool, etc. Martinique 26 was closer. As far as close to bus stops, there's one in each village and at Old Port Royale so there's always one within walking distance.
2. Garden grocer- is there a fee for this service? Also do I still have time to order being 12 days out?? Last would it be possible to send my hubby out in a cab to
walmart or something similar? Price? Time? Would garden grocer be a better bet?
Garden Grocer charges a delivery fee and it's posted on their site. If I am remembering correctly, you must order a minimum of around $40. I would think that you could still order if you do it now. If they can't make the delivery, they will show a "no delivery" or "blackout" date on their site. We drive to Disney and have a car at our disposal and I still order from Garden Grocer. I simply don't want to go buy groceries on vacation so the delivery fee is well worth it to me.
3. According to the map it looks like Epcot and HS are fairly close. We have 8am ressie in Epcot, what time would we need to catch bus to get to this ressie?? Is a cab a better option??
Thank you in advance for any insight