If there is any hiccup, it may be due to some cosmetic repairs that you may easily remedy.
In case you want to see a VA appraisal guideline, take a look at this
With the house across the street selling for 26K over, you shouldn't have to worry too much. Let the appraiser know you have made improvements and give him the information about the house across the street. If you don't agree with the amount he/she appraises it for, you can always appeal.
But since your home is bigger and been remodeled, the appraiser will take that into account and make a positive adjustment. Sounds like it will be fine.
Not much we can say or do since the appraiser will be there shortly :)