I have a mounting concept that might work for you. I helped my Dad do a similar sized flagpole installation at my church.
We sank pieces of angle iron into cement to anchor the pole. The top down view looked like this _IOI_ With the "O" being the flagpole. The angle iron stuck above the ground about 2 feet. We attached the angle iron to the flagpole using two heavy bolts, one near the top of angle iron, and one near the base. The flagpole (pipe) did not stick into the ground. This makes re-painting it, or fixing the top pulley very easy.
You simply remove the bottom bolt and the flagpole pivots around the top bolt, and you can lower it to a sawhorse, etc, to do painting etc.
In regards to your flag ordering, it should be (from top to bottom) US, TX, USMC.
From the Texas Flag Code:
Sec. 3100.054. DISPLAY ON FLAGPOLE OR FLAGSTAFF WITH OTHER FLAG: IN GENERAL. A flag or pennant, other than the flag of the United States, displayed with the state flag:
(1) should not be above the state flag; or
(2) if the other flag or pennant is at the same height as the state flag, should not be, from the perspective of an observer, to the left of the state flag.
Sec. 3100.056. DISPLAY ON FLAGPOLE OR FLAGSTAFF WITH FLAGS OF MUNICIPALITIES, LOCALITIES, OR ORGANIZATIONS. (a) If the state flag is displayed on a flagpole or flagstaff with a group of flags or pennants of municipalities, localities, or organizations that are displayed on flagpoles or flagstaffs, the state flag should be at the center and at the highest point of the group.
(b) If the state flag is displayed on the same halyard as a flag or pennant of a municipality, locality, or organization, the state flag should be at the peak.
Hope it goes well.
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