The fact of the matter is a 150 mm scope and adequate mount for photography later that'll do an Alt-Az mode exceeds the budget ($1k mount or what seems to be $1850 combined). ETA: I assume alt-az for the portability aspect and ease of setup. That said, lots of people move their EQ mounts around, though it is harder.
A 127 mm (which varies, but is probably 120 mm) with Az-EQ mount would satisfy the budget ($1800 combined), and people have made some great planetary imagery with them.
A Synta-made 150 (which is actually 150) with a good equatorial-only mount (e.g., Sirius Pro EQ-G) would satisfy the budget (also $1800 combined).
Can get the iOptron 150 with the iOptron Alt-Az mount for $1900. Alt-Az slightly complicates later photography, tho.
OP's gonna have to weigh in on increasing the budget and whether Alt-Az is mandatory. FWIW, the 150 mm Synta-made scopes (e.g., Orion and Skywatcher brands) are cheaper than the iOptron.
Edited by dakinemaui, 09 April 2019 - 03:33 PM.