seriously, though deepu did speak the facts about reviving an old, failed business but when it came to lending a hand or support, he made excuses and whatnot. his behavior is beyond sibling rivalry that he only spoke negative words towards manu. even if he doesn't want to support, he still wants to jump in and give free gyaans but not lend money towards at least rent or brother's wedding.
i think manu knows his brother's personality yet tries to downplay or ignore it for the sake of famil thus allowing deepu to manage control over the situation.