Excuse me for asking is your land lord private or housing/Council
Does make a difference.
Try and make your antenna as non permanent as possible. When had a council place in Suffolk I had up a four EL beam. First part was scaffold pole in a concreted drum as bottom part. Bury the drum was buried in ground BUT 1 foot below level of the grass so not bee seen. So when moved cut pole down low replace grass not a problem. BUT then a second 22ft scaffold pole was attached to the first via swivel clamp on bottom of pole and the 22ft pole was raised to about angle off ground enough to take me beam off the ground and place it on top of the pole and then lift up into its vert position with rotator and all and clamp off the top bit and bingo she’s up. BUT with in 3 minutes it can be down on the deck and and grounded NONE perimeter .
Now 3 years this has been going on till knock at door. Its the council planning guy. So said to gent WHAT Ariel of big he no looking at ground. So took him into garden and demonstrated what I do. He was impressed, ticked not permanent isolation happy never heard form there again.
Now for what you want to do I be more inclined to drive in a scaffold pole minding there is no power, gas or water pipes in area a ten footer drive in at least 5 to 6 feet then you can strap your bottom of your mast telescopic to it as it won’t move. BUT here you can lower it and take it up at your leisure and it can stay there as its NONE permanent structure. Putting onto brick wall could weaken it and they could have that argument. But on this arrangement you can demo its can be easily removed if need be and antenna can be dropped down if storms arrive of if your away it can be removed. Some body will moan its granted for sure but you must demonstrate why you have it its part of your hobby and ITS not a flag pole.
Once peoples get used to it they will not see it hell I got two 22ft scaffold pole sin my garden holding up me 44m long Loop wire . So if I get a visit I can demonstrate its not permanent and designed if anything fails the pole scan only fall into garden and Joe public is not at risk
I like the way your trying to get on air with out causing problems around you end of day start small and slowly build it up under there noses LOL. Plus may be lightly guy it off so it not swing in wind to much. get plastic bit make triangle and lit it drop say 1/3 down. Good thing about this when you drop the antenna the guys stay where they are and antenna back up they just tighten off by pushing up you telescopic pole or downing it.
Hope this of help