your unsourced numbers for roads are wrong and at best representative of a rural area single lane mile not a 4 lane highway. Here are some better numbers for different places and types of roads:
one city on the front range that isn't even in the colorado river watershed is hardly indicative of the snow pack / snowfall inside that watershed. The inflows into lake Powell are a much better equivalent for the entire watershed and do show a decline. https://graphs.water-data.com/lakepowell/ though that doesn't show diversions / how much is being caught in upstream reservoirs. and the snotel graphs for the watersheds in the colorado basin are a much better source https://www.wcc.nrcs.usda.gov/ftpref/support/states/CO/produ...
So the neighbors who where there first also don't have any parking in their buildings? Only the new residents should be required to park thier cars off street? I fail to see how that is justifiable.
As someone who experienced heart attack like symptoms as an under 30 year old, did go into the hospital and got a pericarditis[1] diagnosis, I think that describing your friends unknown heart condition as a heart attack is unnecessary fear mongering considering similar symptoms can present themselves as a much less severe condition. Both the Vaccine and Covid are known have a low chance of causing heart issues.
This is not true, Vail has had a 10 story building since the 1970's[1], Beaver run in Breckenridge is 9 stories and has also been around for a while, the westin in avon is 10 stories, if you count blackhawk as a resort it has some 20-30 story towers in a super narrow canyon. thats just the ones I can think of off the top of my head, perhaps tall buildings don't have as large of a impact as you think.
https://www.fhwa.dot.gov/policy/23cpr/appendixa.cfm (scroll down a little ways)
so your reference for freeway is likely using a single lane number not the actual cost of a 4 lane high way which would be 12 - 80 million per mile.