The church already lobbies for the things they want. This simply ensures they pay the price of admission that I and everyone else already pay.
There is no price of admission for Freedom of Speech and Petition. Under the US system, everyone has those inherently, taxes or not be damned. Heck, for more than half the US' history, individuals paid no direct taxes on them, but still had Freedom of Speech and Petition.
It would be nice to see some of these grand stadium sized megachurches pay some property tax, maybe get the roads fixed.
That's not what would happen. Those big megachurches have enough money and individuals involved that they would easily find a way of avoiding paying most of the taxes just like any other large organization does.
No, what this would do is destroy small local community churches with small congregations. It would also destroy many historical and community churches in areas where land values have dramatically gone up. Either that, or it would cause those smaller community churches to have to dramatically reduce the number things they do to serve the local community.
Bear in mind,
nearly half (47%) of Churchgoers in America go to a Church with
fewer than 100 members. Medium Churches (> 100 < 1000) account for the
next 47%. Only 8% of Church goers in the US go to what can be called a "Megachurch".
Do you really think a small church of around 100 members can easily absorb a sudden annual tax of thousands, if not tens of thousands of dollars? Those medium Churches who CAN afford it (and that likely is only the upper end of those), they're going to pull it from funds they would otherwise use to serve their community.
But that's not all the damage it would do. There are many Churches that are also historical buildings in the core of older cities. Consider... what do you think the property value of
St. Patrick's Cathedral is? Sure, the RCC is likely able to afford to pay taxes on it... but is the
Episcopal Church? Or a
Historical Black Baptist Church? You can find many such older Churches still acting as Churches throughout the United States, especially in core city areas.