I have looked into the kmz and I can surely provide you with tree counts per block with block-level statistic of 2xblocks. I am also experienced with processing and analyzing aerial imageries and can provide aerial products such as 2D ortho-mosaics, point clouds and DSM. I am also experienced with Deep Learning libraries of ArcGIS Pro and Deep Learning plugins of QGIS.
I have some queries regarding your work details. You are requested to let me know via text, please:
(i) Do you also require tree diameter?
(ii) In deliverables, you are required maps of elevation, slope and satellite imagery (past 3 years): Let me know that you require any single maps of elevation, slope and satellite imagery in each for the past three years or anything else? Further, you require maps of any publicly available datasets for elevation (SRTM, ASTER, ALOS, etc.), slope (extracted from elevation/DEM), and satellite imagery (Sentinel-2, Landsat 8/9, etc.) or you will provide the datasets for producing maps?
I would be very happy to work with you for a long run and looking forward to your positive response.