Depending on the loan products it might vary. Usually ,  you need the followings:

• 2 Years of Tax Returns
• Credit Report
• Copy of pay-checks for a month
• 2 Months of Bank Statements
• 2 Years of W2s
• Two forms of IDs

A few factors will determine if you can qualify for a mortgage. How much  earn would be the first question? The more you earn the more amount of loan you can qualify for.  But everybody earning the same amount would qualify for the same amount of loan. Your credit would determine your interest rate. The more the interest rate the lower the amount you would qualify for. So , having a better credit would increase your purchasing power as your interest rate would be lower.

There are so many loan products out there. So it is hard to say which is good for you. But we can say that the loan program that best fits you is the best one for you. It all depends on your income, downpayment, credit score and so on. Your profession might play a role there too. For example, if you are a veteran , the VA loan might the best option for you.

Usually, FHA is good for people with lower downpayment and bad credit. If your credit is over 700, conventional loans might be a good choice. Homeready and Homepossible are affordable products with better rates. Both programs are easy to qualify as well.

As a borrower if it is customary for you using cash , you might qualify  to use cash in hand for your down-payment. But it depends on the scenario of a particular borrower. Not all borrowers will qualify for this option.

It depends on few things. If you go for the FHA loan , you need only 3.5% down payment to buy a single or multifamily primary residence.

In case of  conventional loan programs you need at least 15% down-payment for a two family primary residence.  A minimum of 5% down payment required for a single family residence.

If you qualify for HomeReady or HomePossible conventional loan programs,  you can buy a single family  home with only 3% down payment and a two family home with 5% down payment. But your income can’t exceeed the income limit set by these two programs. To find out the income limit in your county you can use this link https://ami-lookup-tool.fanniemae.com/amilookuptool/.

Lenders cannot charge you as much as they want. As a consumer you are protected by law. When it comes to a conforming loan , a lender cannot charge you more than 3% including fees and points, if your loan amount 100K or more. For a loan amount of 60k to 100k, as a borrower you can't be charged more than $3000.  

Not all loan programs are governed by this role.  FHA and conventional loan programs follow this rule to make sure lenders do not charge fees and points exceeding this limit. It ensures borrowers are not paying more than what they should. Keeping the fees low helps borrowers repay the loan.