Walikum Salaam,
First of all Congratulations for having been blessed to perform Umrah.
With due respect, please stop worrying about the things to be arranged to avoid inconvenience. You will get everything in Makah and Madina at a price, alhamdulilla. As you are going by Air, I am sure, you can afford them.
Start preparing to perform Umrah in the right way. Ask some known persons, as to what and all to be done while performing Umrah, so that it is accepted by almighty Allah. The duwas to be performed and the things to be observed while performing Umrah. Spend as much time as possible in Haram, avoid going around to see and shopping. Even if you do not read Arabic, just by seeing Kaaba, in appreciation of Allah, one will be blessed.
Hope you take my suggestions in the right spirit. Do remember me and my family members in your duwas.
All the best for you and your family. Let Allah accept your Umrah and bless all Muslims at least once in their life time to perform Umrah and Hajj. Ameen.