@Vivian O. you are being given some confusing and contradicting advice here. Maybe I can help to put things a bit in perspective.
First, keep in mind that how offers are written and presented is very different in many States. Midwest works much different than Califoria. It's not only the state law, also lending and how offers are presented varies greatly. Some of the things I read here will definitly not fly in MN.
Second, speaking for Wisconsin and probably MN, sellers will always much prefer a conventional loan over FHA or VA! As soon as you are conventional the property does not have to pass the much dreaded FHA inspection. It often results in a repair list for the seller to keep the deal together; listing agents are well aware of this. FHA is always the the last choice for a seller. Is it better to have 20% down, yes, but the most important thing to sellers is that you are conventional. In markets like the Bay Area you need to have over 20% down, because everyone expects (!) the property to not appraise out and the buyer has to be able to close the gap with cash. You see how different local issues are. So, you did the right thing to go with 5% conventional.
Blasting out 20 or 100 offers is something I have never understood. As a listing agent I will catch that in the first 3 seconds looking at it and advise my client accordingly. I am sure it does work in a certain market segements and with the combination of desperate and maybe naive seller, incompetent listing agent and a property with issues. This approach will not work for a quality property, at least not in my market. If I write offers for myself I get about 2 out of 3 accepted. Someone will say now I am offering too much, but comapring my acqiuisitions with solds tells me different. It is a matter of understanding the seller before writing the offer and that takes some work, effort and experience.
Witch leads me to the last point - working with an great agent. I don't enjoy stating this, but everyone knows agents come in many different grades. I know from my own experience when I started working as an investor and long before I got licensed - I had to part ways from quite a few to find someone who was actually competent. A good buyers agent will get deals accepted. Not every single one, but most of it. Here is why - I can tell my clients before we write the offer what the probabability is to get it accepted. Your agent does not know what they are doing if they put you up against 30 other offers with 5% down. They should know there will be at least 5 cash offers and 3 of them will be absurdly high. Anyone who has ever read Sun Tzu knows that is not the way to go into battle. Its a waste of time at best.
The only real practical advise I can give you from afar is to find a really good agent, preferably one that specializes in buyer representation. Ask a broker for who their top performing buyers agents are. You want to work with someone who personally (not team) does over 40 or 50 transactions a year. I am with Keller Williams and you can just call any KW market center and ask to speak with the team leader; they will match you up. Hope this helps, don't get discouraged, it will work out!