Maharashtra

For mechanical engineering :
https://www.shiksha.com/top-mechanical-engineering-colleges-in-pune-rankingpage-48-0-0-174-0
For automation engineering :
Planet Automation Systems
Chintamani Nagar, Kondhwa Khurd, Pune
09850396034
Prolific System ans Technologies pvt ltd
www.prolifictraining.com
Office No. 36, First Floor, Preet Chambers, Mumbai Pune Road, Wakde Wadi, Pune
020 25533691
PLC Automation Training
www.plctrg.com

Padmashree D Y Patil College of Architecture, Vidya Pratishthan's College of Engineering (VPCOE) and Bharati Vidyapeeth College of Architecture are the top colleges for B.Arch in Pune.

First of all, congratulations on securing such a high score in NATA. Yes definitely you will get admission in colleges outside Maharashtra. Some good colleges for your reference would be -
CEPT, Ahmedabad
SPA, Delhi
Department of Architecture, IIT Roorkee
Sir J J College of Architecture, Mumbai
Department of Architecture, NIT Tiruchirapalli
Department of Architecture, NIT Calicut
BGS School of Architecture and Planning, Bangalore
R V School of Architecture, RVCE, Bangalore

They offer integrated BBA LLB course. Think well before joining the institute.

No, they don't have any such quota. You can only get admission on the basis of CAT score and your performance in GD-PI.

Top colleges are:
Don Bosco Norman Maritime Academy
International Institute of Maritime Studies
Samundra Institute of Maritime Studies
Directorate General of Shipping
Indian Institute of Technology , Mumbai
Lal Bahadur Shastri College of Advanced Maritime Studies & Research
Marine Engineering & Research Institute
Padmabhushan Vasantdada Patil Pratishthan's College of Engineering
T.S Chanakya
The Shipping Corporation of India
*IMUCET is only for Indian Maritime University and its 5 campuses across India, for other institutes you have to appear for their respective entrance examinations.

There is a Common Entrance Test (CET), only through CET the admission to such colleges shall will given, which is conducted by the Maharashtra Government. It's more like an entrance exam.
For more proper information, follow this link: https://ilslaw.edu/admissions-by-central-entrance-test/

ISB&M Nande is a much more better option than BIMM not only on the academic basis but for the further individual enhancement which leads to over all development of a candidate. Regarding the infrastructure of the campus, it is situated in one of the best location of the Pune with good accommodation and many other facilities within in the campus.
For the placement the average placement lies between Rs 6-7 lakhs while the highest went to Rs 17 lakhs. Brands like Credit Suisse, Asian Piants, Con Agra, Volvo, etc. come for the summer as well as finals recruitment.

Chances of a good payment always depend on you. First of all, polish yourself in one or two technologies, then get started with any job you get. Meanwhile, keep applying for better jobs and switch. Don't wait to get a good one at the first go.
All the best.

Among these two, MITSOM is better option. You could also try Balaji group.